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A005940 The Doudna sequence: write n-1 in binary; power of p_k in a(n) is # of 1's that are followed by k-1 0's.
(Formerly M0509)
+0
4
1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 15, 12, 25, 18, 27, 16, 11, 14, 21, 20, 35, 30, 45, 24, 49, 50, 75, 36, 125, 54, 81, 32, 13, 22, 33, 28, 55, 42, 63, 40, 77, 70, 105, 60, 175, 90, 135, 48, 121, 98, 147, 100, 245, 150, 225, 72, 343, 250, 375, 108, 625, 162, 243, 64, 17, 26, 39 (list; graph; listen)
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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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