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A277701
Positions of ones in A264977; positions of twos in A277330.
11
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
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. also A277712, A277713.
Sequence in context: A155054 A158756 A185086 * A159351 A163251 A247177
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 27 2016
STATUS
approved