A277701 Positions of ones in A264977; positions of twos in A277330.

1, 5, 13, 29, 41, 61, 85, 125, 173, 209, 253, 281, 313, 349, 421, 509, 565, 629, 701, 845, 929, 1021, 1133, 1261, 1405, 1693, 1861, 2045, 2269, 2525, 2665, 2813, 3121, 3313, 3389, 3725, 3905, 4093, 4541, 4841, 5053, 5209, 5257, 5333, 5629, 5993, 6245, 6629, 6781, 7453, 7813, 8189, 8537, 9085, 9593, 9685, 9905, 10109, 10421, 10517, 10669, 10921

Offset

1,2

Comments

Positions in A260443 of terms that are twice square (terms in A001105, although not all of them are present in A260443).

Links

Antti Karttunen, Table of n, a(n) for n = 1..720

Formula

A277712(n) = 2*a(n) for all n >= 1.

Prog

(Scheme, with Antti Karttunen's IntSeq-library, two implementations)
(define A277701 (MATCHING-POS 1 1 (lambda (n) (= 1 (A264977 n)))))
(define A277701 (MATCHING-POS 1 1 (lambda (n) (= 2 (A277330 n)))))

Crossrefs

Row 1 of A277710.

Cf. A001105, A260443, A264977, A277330.

Cf. also A277712, A277713.

Sequence in context: A155054 A158756 A185086 * A159351 A163251 A247177

Adjacent sequences: A277698 A277699 A277700 * A277702 A277703 A277704

Keyword

nonn

Author

Antti Karttunen, Oct 27 2016

Status

approved