Tootfinder

I'm not going to actually use this, which makes me sad, but I do get to share it here: If you start counting by 1s from 0, and then every 6 numbers start to represent the next-highest odd number as a group (3s, then 5s, then 7s) and take the middle number of each group, you hit a bunch of really cool numbers along the way:
0, 1, 2, 3, 4, 5
7, 10, 13, 16, 19, 22,
26, 31, 36, 41, 46, 51,
57, 64, 71, 78, 85, 92,
100, 109, 118, 127, 136, 145,
155, 166, 177, 188, 199, 210,
222, 235, 248, 261, 274, 287,
301, 316, etc.
You've got sweet almost-power-of-2 primes like 7, 31, and 127 in there, along with both 10 and 100 (but only almost 20 and 200), and powers of 2 like 2, 4, 16, and 64.
#numbers #math #sequence