Using bash variables for range in sed

for i in $(seq 1 $END); do echo $i; done

ssh user@serverip "/usr/path/to/script.sh http://www.web.com/$1 http://web.com/$2 $timestamp";

/usr/path/to/script.sh http://www.web.com/$1 http://web.com/$2 $timestamp

ssh user@serverip "/usr/path/to/script.sh 'http://www.web.com/$1' 'http://web.com/$2' '$timestamp'";

for ((i=t1; i<=t2; i++)) ; do
    host=$host_start$i.$domain

for i in $( seq $t1 $t2 ) ; do
    host=$host_start$i.$domain

declare -a funcenv=(MYVAR=test "MYVAR2='test2 test3'")
for pairs in "${funcenv[@]}"; do
    eval "$pairs"
done
"$funcname"

seq 192 192 |
xargs -i seq -f "{}.%.0f" 168 168 |
xargs -i seq -f "{}.%.0f" 0 0 |
xargs -i seq -f "{}.%.0f" 0 255

seq $a $e |
xargs -i seq -f "{}.%.0f" $b $f |
xargs -i seq -f "{}.%.0f" $c $g |
xargs -i seq -f "{}.%.0f" $d $h |
while read ip; do
   ...
done