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A277712
Positions of 2's in A264977; positions of 3's in A277330.
9
2, 10, 26, 58, 82, 122, 170, 250, 346, 418, 506, 562, 626, 698, 842, 1018, 1130, 1258, 1402, 1690, 1858, 2042, 2266, 2522, 2810, 3386, 3722, 4090, 4538, 5050, 5330, 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
OFFSET
1,1
COMMENTS
Positions in A260443 of terms that are three times a perfect square (terms in A033428, although not all of them are present in A260443).
FORMULA
a(n) = 2*A277701(n).
PROG
(Scheme, with Antti Karttunen's IntSeq-library, two implementations)
(define A277712 (MATCHING-POS 1 1 (lambda (n) (= 2 (A264977 n)))))
(define A277712 (MATCHING-POS 1 1 (lambda (n) (= 3 (A277330 n)))))
CROSSREFS
Row 2 of A277710.
Cf. also A277713.
Sequence in context: A045605 A294871 A212969 * A009307 A131130 A099969
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 28 2016
STATUS
approved