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%I #10 Sep 01 2016 16:51:08
%S 1,4,12,19,22,65,98,123,135,179,268,284,346,365,385,534,581,605,696,
%T 750,776,834,985,1017,1081,1340,1452,1530,1569,1773,1816,1969,2080,
%U 2126,2412,2641,2797,2903,2958,3350,3435,3553,3613,3892,4018,4340,4473,4571,4708
%N Positions of 2 in A274640.
%H Alois P. Heinz, <a href="/A275116/b275116.txt">Table of n, a(n) for n = 1..10073</a>
%H Alois P. Heinz, <a href="/A275116/a275116.jpg">Positions of first 1410 2's in plane of A274640</a>
%F A274640(a(n)) = 2.
%Y Cf. A274640.
%K nonn
%O 1,2
%A _Zak Seidov_, Jul 17 2016