This repository is part of the Liberation through Computer Literacy Project. For more information see the following threads on the Raspberry Pi forum:
https://www.raspberrypi.org/forums/viewtopic.php?f=31&t=257317
https://www.raspberrypi.org/forums/viewtopic.php?f=31&t=240287
https://www.raspberrypi.org/forums/viewtopic.php?f=62&t=227343
https://projecteuler.net/problem=256
https://oeis.org/A068920/a068920.txt
https://www.combinatorics.org/ojs/index.php/eljc/article/view/v16i1r126