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%I #8 Sep 10 2018 10:12:32
%S 1,1,1,1,2,3,3,3,3,4,5,5,5,6,7,7,7,7,7,8,9,10,10,11,12,12,12,13,14,14,
%T 14,14,15,16,16,16,17,18,19,19,19,19,20,21,21,21,21,21,21,22,23,23,24,
%U 25,25,25,26,27,27,27,28,29,29,29,29,29,30,31,32,32,32
%N Number of odd terms among first n terms of A064413.
%H J. C. Lagarias, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0204011">The EKG sequence</a>, Exper. Math. 11 (2002), 437-446.
%H <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a>
%t ekg[s_] := Block[{m = s[[-1]], k = 3}, While[MemberQ[s, k] || GCD[m, k] == 1, k++]; Append[s, k]];
%t EKG = Nest[ekg, {1, 2}, 100];
%t Boole[OddQ[#]]& /@ EKG // Accumulate (* _Jean-François Alcover_, Sep 10 2018, after _Robert G. Wilson v_ *)
%Y See A064475 for another version.
%K nonn
%O 1,5
%A _N. J. A. Sloane_, Oct 30 2001
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