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A336119
Numbers k such that A122111(k) [the conjugated prime factorization of k] is a square or twice a square.
5
1, 2, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 27, 29, 31, 33, 37, 39, 41, 43, 45, 47, 49, 51, 53, 57, 59, 61, 63, 67, 69, 71, 73, 77, 79, 81, 83, 87, 89, 91, 93, 97, 99, 101, 103, 107, 109, 111, 113, 117, 119, 123, 127, 129, 131, 133, 135, 137, 139, 141, 147, 149, 151, 153, 157, 159, 161, 163, 167, 169, 171, 173
OFFSET
1,2
COMMENTS
Sequence A122111(A028982(k)), k >= 1, sorted into ascending order.
PROG
(PARI) isA336119(n) = (A335909(n)); \\ See code in A335909.
CROSSREFS
Cf. A000040, A066207 (subsequences), A335909 (characteristic function).
Positions of odd terms in A323173, positions of zeros in A336120 and A336121, positions of ones in A336312.
Sequence in context: A053224 A277334 A091377 * A213511 A092919 A005357
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 14 2020
STATUS
approved