A277715 Row 5 of A277710: Positions of 5's in A264977; positions of 10's in A277330.

9, 21, 45, 93, 189, 381, 657, 765, 873, 1317, 1533, 1749, 2457, 2637, 3069, 3501, 4329, 4917, 5241, 5277, 5745, 6141, 6345, 7005, 8661, 9561, 9837, 10017, 10485, 10557, 11493, 12285, 12693, 14013, 15129, 17325, 17985, 19125, 19677, 20037, 20973, 21117, 21969, 22989, 24573, 25389, 26793, 28029, 30261, 31545, 34653, 35973

Offset: 1

Author

Antti Karttunen, Oct 29 2016

Keywords

• nonn

Comments

Positions in A260443 of terms that are ten times a perfect square (terms in A033583, although not all of them are present in A260443).

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.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..444

Crossrefs

Row 5 of A277710.

Cf. A033583, A068156, A260443, A264977, A277330, A277716.

Formula

A277716(n) = a(n)/3.