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

1,2

Comments

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

Links

Table of n, a(n) for n=1..73.

Prog

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

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.

Sequence in context: A053224 A277334 A091377 * A213511 A092919 A005357

Adjacent sequences: A336116 A336117 A336118 * A336120 A336121 A336122

Keyword

nonn

Author

Antti Karttunen, Jul 14 2020

Status

approved