A336119 Numbers k such that A122111(k) [the conjugated prime factorization of k] is a square or twice a square.

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

Author

Antti Karttunen, Jul 14 2020

Keywords

• nonn

Comments

Sequence A122111(A028982(k)), k >= 1, sorted into ascending order.

Crossrefs

Cf. A000040, A066207 (subsequences), A335909 (characteristic function).

Cf. A028982, A031215, A031368, A053866, A122111.

Positions of odd terms in A323173, positions of zeros in A336120 and A336121, positions of ones in A336312.

Programs

PARI

isA336119(n) = (A335909(n)); \\ See code in A335909.