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%I A067586 #6 Jun 24 2014 01:08:21
%S A067586 0,0,1,0,1,2,0,1,1,3,0,1,1,2,4,0,1,1,1,2,5,0,1,1,1,2,2,6,0,1,1,1,1,2,
%T A067586 3,7,0,1,1,1,1,2,2,3,8,0,1,1,1,1,1,2,2,3,9,0,1,1,1,1,1,2,2,2,3,10,0,1,
%U A067586 1,1,1,1,1,2,2,2,4,11,0,1,1,1,1,1,1,2,2,2,3,4,12,0,1,1,1,1,1,1,1,2,2,2
%N A067586 Number of 0's in the binary expansion of A066884(n+1).
%t A067586 a[n_] := Module[{}, r=Floor[(Sqrt[8n+1]-1)/2]; s=n-r*(r+1)/2; For[k=0, True, k++, If[s<Binomial[r-s+1+k, k], Return[k]]]]
%K A067586 easy,tabl,nonn
%O A067586 0,6
%A A067586 Jared Ricks (jaredricks(AT)yahoo.com), Jan 31 2002
%E A067586 Edited by _Dean Hickerson_, Feb 16 2002

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