What Is the Next Number in the Sequence 10, 10, 11, 12, 15, 16, 21?

Thread '15 Years at PF!'

Hey all. Looks like my 15 year anniversary of joining PF happened yesterday (while my internet was down). Just wanted to say thanks to everyone, staff and non-staff, for helping make PF such a wonderful community over the years. Here's to everyone at PF, current, past, or future. Cheers!

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Thread 'Happy Pythagorean Day!'

In mm/dd/yy format, 9/16/25 is 32/42/52. In dd/mm/yy, it's 42/32/52, still Pythagorean, but not monotonically sequential.

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Thread '15 Years at PF!'

Thread 'Happy Pythagorean Day!'

Thread 'Collection of Lame Jokes'

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