The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #7 Oct 30 2016 13:46:54
%S 2,10,26,58,82,122,170,250,346,418,506,562,626,698,842,1018,1130,1258,
%T 1402,1690,1858,2042,2266,2522,2810,3386,3722,4090,4538,5050,5330,
%U 5626,6242,6626,6778,7450,7810,8186,9082,9682,10106,10418,10514,10666,11258,11986,12490,13258,13562,14906,15626,16378,17074,18170,19186,19370,19810
%N Positions of 2's in A264977; positions of 3's in A277330.
%C Positions in A260443 of terms that are three times a perfect square (terms in A033428, although not all of them are present in A260443).
%F a(n) = 2*A277701(n).
%o (Scheme, with _Antti Karttunen_'s IntSeq-library, two implementations)
%o (define A277712 (MATCHING-POS 1 1 (lambda (n) (= 2 (A264977 n)))))
%o (define A277712 (MATCHING-POS 1 1 (lambda (n) (= 3 (A277330 n)))))
%Y Row 2 of A277710.
%Y Cf. A033428, A260443, A264977, A277701, A277330.
%Y Cf. also A277713.
%K nonn
%O 1,1
%A _Antti Karttunen_, Oct 28 2016