FF PP ZZ by tails

b=({0..9} {A..Z})
read n
for((;x=++y<n;)){
for((;x<n;)){
printf %3s ${b[x*y/n]/0}${b[x++*y%n]}
}
echo
}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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