The ruler function: 2^a(n) divides 2n. Or, a(n) = 2-adic valuation of 2n.
1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 6, 1, 2
6 seqfan posts
Mon Jan 2 21:24:33 CET 2012 [seqfan] Re: Regarding primes in A046699.
Thu Oct 13 04:14:02 CEST 2011 [seqfan] Chewing an old bone
Sat Aug 20 19:12:10 CEST 2011 [seqfan] Re: Interesting property of A001151
Sat Aug 20 01:27:17 CEST 2011 [seqfan] Re: Interesting property of A001151
Thu Mar 18 03:20:17 CET 2010 [seqfan] Re: need algebra proof
Wed Mar 11 00:11:21 CET 2009 [seqfan] Re: guessing doubling formulas for sequences
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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