Finding out if a sequence of digits is a “numpad path”I noticed that several of my old credit cards have verification codes which have an interesting property which I'll call "numpathable". A numpad is a graph that looks like this: 7 - 8 - 9...#john-feminella#probability·math.stackexchange.com·Aug 22, 2020Finding out if a sequence of digits is a “numpad path”
