|
%I #12 Jan 14 2018 23:00:18
%S 3,6,7,8,9,12,15,16,17,18,19,20,21,22,23,24,25,26,27,30,33,34,35,36,
%T 39,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
%U 64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,84
%N Positions of 1 in A189820; complement of A003278.
%H G. C. Greubel, <a href="/A189822/b189822.txt">Table of n, a(n) for n = 1..10000</a>
%t a[1] = 0; h = 50;
%t Table[a[3 k - 2] = a[k], {k, 1, h}];
%t Table[a[3 k - 1] = a[k], {k, 1, h}];
%t Table[a[3 k] = 1, {k, 1, h}];
%t Flatten[Position[%%, 1]]
%Y Cf. A081610, A189820, A003278.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 28 2011
|
