diff --git a/lib/adapter/cmd.py b/lib/adapter/cmd.py
index 7680998..7ecbdf3 100644
--- a/lib/adapter/cmd.py
+++ b/lib/adapter/cmd.py
@@ -130,10 +130,10 @@ class AdapterOeis(CommandAdapter):
             cmd[0] = _get_abspath(cmd[0])
 
         # cut oeis/ off
-        # Replace all non (numeric, '-') chars with Spaces to delimit args to oeis.sh
+        # Replace all non (alphanumeric, '-') chars with Spaces to delimit args to oeis.sh
         if topic.startswith("oeis/"):
             topic = topic[5:]
-            topic = re.sub('[^0-9-]', ' ', topic)
+            topic = re.sub('[^a-zA-Z0-9-]', ' ', topic)
 
         return cmd + [topic]
 
diff --git a/share/adapters/chmod.sh b/share/adapters/chmod.sh
index 233cb4c..0ddfb89 100755
--- a/share/adapters/chmod.sh
+++ b/share/adapters/chmod.sh
@@ -16,15 +16,16 @@ chmod_calc(){
   setuid=' '
   setgid=' '
   sticky=' '
-  # If permission number is given calc string
-  if [[ $1 =~ ^-?[0-9]+$ && ${#1} -ge 2 && ${#1} -le 4 ]]
+  # If permission number is given -> calc string
+  if [[ $1 =~ ^-?[0-9]+$ && ${#1} -ge 1 && ${#1} -le 4 ]]
   then
-    p_n=$1
-    for (( i=0; i<${#1}; i++ ))
+    p_n=$(printf "%04s\n" "$1" | tr ' ' '0')
+    echo $p_n | grep -q '[8-9]' && return 1
+    for (( i=0; i<${#p_n}; i++ ))
     do
-      num=$(echo "obase=2;${1:$i:1}" | bc | xargs printf '%03d')
-      # If 4 digit input, process specials
-      if [[ ${#1} -eq 4 && $i -eq 0 ]]
+      num=$(echo "obase=2;${p_n:$i:1}" | bc | xargs printf '%03d')
+      # If 4 digit input -> process specials
+      if [ $i -eq 0 ]
       then
         [ ${num:0:1} -eq 1 ] && setuid='X' || setuid=' '
         [ ${num:1:1} -eq 1 ] && setgid='X' || setgid=' '
@@ -52,8 +53,8 @@ chmod_calc(){
         [ ${num:2:1} -eq 1 ] && X+=('X') || X+=(' ')
       fi
     done
-  # If permission string is given calc number
-  elif [[ ${#1} -le 9 && $(( ${#1} % 3 )) -eq 0 && $1 =~ ^[r,s,S,t,T,w,x,-]+$ ]]
+  # If permission string is given -> calc number
+  elif [[ ${#1} -eq 9 && $1 =~ ^[r,s,S,t,T,w,x,-]+$ ]]
   then
     p_s=$1
     num=0
@@ -63,21 +64,30 @@ chmod_calc(){
     [[ 'tT' =~ ${p_s:8:1} ]] && sticky='X' && num=$((num+1))
     [ ${num} -gt 0 ] && p_n+="$num"
     # Calculate rest of p_n number while populating arrays for table
-    for (( i=0; i<${#1}; i+=0 ))
+    for (( i=0; i<${#p_s}; i+=0 ))
     do
       num=0
-      [[ ${1:$i:1} == 'r' ]] && R+=('X') || R+=(' ')
-      [[ ${1:$((i++)):1} == 'r' ]] && let num++
+      [[ "r-" =~ ${p_s:$i:1} ]] || return 1
+      [[ ${p_s:$i:1} == 'r' ]] && R+=('X') || R+=(' ')
+      [[ ${p_s:$((i++)):1} == 'r' ]] && let num++
       num=$(( num << 1 ))
-      [[ ${1:$i:1} == 'w' ]] && W+=('X') || W+=(' ')
-      [[ ${1:$((i++)):1} == 'w' ]] && let num++
+      [[ "w-" =~ ${p_s:$i:1} ]] || return 1
+      [[ ${p_s:$i:1} == 'w' ]] && W+=('X') || W+=(' ')
+      [[ ${p_s:$((i++)):1} == 'w' ]] && let num++
       num=$(( num << 1 ))
-      [[ 'stx' =~ ${1:$i:1} ]] && X+=('X') || X+=(' ')
-      [[ 'stx' =~ ${1:$((i++)):1} ]] && let num++
+      if [ $i -lt 6 ]
+      then
+        [[ "sSx-" =~ ${p_s:$i:1} ]] || return 1
+        [[ "sx" =~ ${p_s:$i:1} ]] && X+=('X') || X+=(' ')
+        [[ "sx" =~ ${p_s:$((i++)):1} ]] && let num++
+      else
+        [[ "tTx-" =~ ${p_s:$i:1} ]] || return 1
+        [[ "tx" =~ ${p_s:$i:1} ]] && X+=('X') || X+=(' ')
+        [[ "tx" =~ ${p_s:$((i++)):1} ]] && let num++
+      fi
       p_n+="$num"
     done
   else
-    printf "Invalid permissions string: $1"
     return 1
   fi
   # Print Final results table
@@ -95,3 +105,4 @@ Sticky bit [$sticky]\tExecute [${X[0]}]\tExecute [${X[1]}]\tExecute [${X[2]}]
 }
 
 chmod_calc $@
+[ $? -ne 0 ] && printf "Invalid permissions string: $@\n"
diff --git a/share/adapters/oeis.sh b/share/adapters/oeis.sh
index d57bf70..18c458e 100755
--- a/share/adapters/oeis.sh
+++ b/share/adapters/oeis.sh
@@ -51,15 +51,16 @@ oeis() (
   # 	. oeis <SEQ_ID>
   # 	. oeis <SEQ_ID> <LANGUAGE>
   # 	. oeis <LANGUAGE> <SEQ_ID>
-  if [ $# -lt 3 ]
+  isNum='^[0-9]+$'
+  if [ $# -lt 3 ] && [[ ${1:1} =~ $isNum || ${2:1} =~ $isNum || ${1} =~ $isNum || ${2} =~ $isNum ]] && ! echo $1 | grep -q '[0-9]' || ! echo $2 | grep -q '[0-9]'
   then
     # Arg-Parse ID, Generate URL
     if echo ${1^^} | grep -q '[B-Z]'
     then
-      ID=$2
+      ID=${2^^}
       LANGUAGE=$1
     else
-      ID=$1
+      ID=${1^^}
       LANGUAGE=$2
     fi
     [[ ${ID:0:1} == 'A' ]] && ID=${ID:1}
@@ -103,7 +104,7 @@ oeis() (
   # Search unknown sequence
   else
     # Build URL
-    URL+="/search?q=signed%3A$(echo $@ | grep -v [a-z] | grep -v [A-Z] | tr ' ' ',')"
+    URL+="/search?q=signed%3A$(echo $@ | tr -sc '[:digit:]-' ',')"
     curl $URL 2>/dev/null > $DOC
     # Sequence IDs
     grep -o '=id:.*&' $DOC \