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%I #15 Sep 01 2016 21:33:05
%S 2,5,16,25,33,40,78,89,158,172,221,237,376,395,415,523,570,749,777,
%T 790,876,923,1016,1114,1182,1303,1341,1473,1512,1754,1839,1970,2105,
%U 2267,2315,2488,2538,2957,3012,3204,3262,3467,3527,3646,3983,4110,4276,4744,4815
%N Positions of 3 in A274640.
%H Alois P. Heinz, <a href="/A275172/b275172.txt">Table of n, a(n) for n = 1..10074</a>
%H Alois P. Heinz, <a href="/A275172/a275172.jpg">Positions of first 1411 3's in plane of A274640</a>
%F A274640(a(n)) = 3.
%Y Cf. A274640, A273059, A275116, A275188, A275189, A275190, A275191, A275192, A275193, A275194.
%K nonn
%O 1,1
%A _Zak Seidov_, Jul 19 2016
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