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I'm going to run a group - Painting the OEIS. Please share your favorite sequences and why. I'll share what art I do with any of them. #oeis #mtbos #mathArt

oeis.org/A005245, 1, 2, 3, 4, 5, 5, 6, 6, 6, 7, 8, 7, 8, 8, 8,... minimum number of 1s needed to write n using +, * ( and ) Writte as ||n||. Open problem: For all k>0, is ||2^k || = 2k ? An open elementary number theory problem where unlike many others, we're really uncertain about the answer.