#!/usr/bin/env bash
# Esoteric random number generator
# <http://dilbert.com/strip/2001-10-25>
for ((seed = RANDOM ** 2, i = 0; i < ${#seed}; i++)) ; do
    ((sum += ${seed:i:1}))
done
for ((red = seed-sum; ${#red} > 1; red = redn)) ; do
    for ((j = 0, redn = 0; j < ${#red}; j++)) ; do
        ((redn += ${red:j:1}))
    done
done
printf '%u\n' "$red"