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A126806
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Smallest number k such that 2^n divides A066796(k) = Sum(i=1,k,binomial(2*i,i)).
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0
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1, 2, 2, 11, 11, 46, 46, 707, 707, 707, 2831, 2831, 11955, 11962, 45256, 45256, 191400, 533697, 533697, 533697
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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sb[1] = 2; sb[k_] := sb[k] = sb[k - 1] + Binomial[2k, k]; f[n_] := Block[{k = 1}, While[ Mod[sb@k, 2^n] != 0, k++ ]; k]; Do[Print@ f@n, {n, 0, 15}] (* Robert G. Wilson v, Feb 25 2007 *)
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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