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Comments in green were written by me. Comments in blue were not written by me.

2020-01-02

It's interesting that the three puzzles with the most incorrect attempts can all be looked up on OEIS.

Day 15 - https://oeis.org/A001055 - "number of ways of factoring n with all factors greater than 1"

Day 4 - https://oeis.org/A001045 - "number of ways to tile a 2 Ã— (n-1) rectangle with 1 Ã— 2 dominoes and 2 Ã— 2 squares"

Day 2 - https://oeis.org/A002623 - "number of nondegenerate triangles that can be made from rods of length 1,2,3,4,...,n"

Adam Abrams
on /blog/72

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