The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #10 Oct 30 2016 13:47:44
%S 9,21,45,93,189,381,657,765,873,1317,1533,1749,2457,2637,3069,3501,
%T 4329,4917,5241,5277,5745,6141,6345,7005,8661,9561,9837,10017,10485,
%U 10557,11493,12285,12693,14013,15129,17325,17985,19125,19677,20037,20973,21117,21969,22989,24573,25389,26793,28029,30261,31545,34653,35973
%N Row 5 of A277710: Positions of 5's in A264977; positions of 10's in A277330.
%C Positions in A260443 of terms that are ten times a perfect square (terms in A033583, although not all of them are present in A260443).
%C It seems that A068156 from 9 onward is a subsequence, which (if true) would also be a sufficient condition for this sequence to be infinite.
%H Antti Karttunen, <a href="/A277715/b277715.txt">Table of n, a(n) for n = 1..444</a>
%F A277716(n) = a(n)/3.
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A277715 (MATCHING-POS 1 1 (lambda (n) (= 5 (A264977 n)))))
%Y Row 5 of A277710.
%Y Cf. A033583, A068156, A260443, A264977, A277330, A277716.
%K nonn
%O 1,1
%A _Antti Karttunen_, Oct 29 2016