A374049 Numbers k for which A328846(k) is even, where A328846 is the second Fibonacci based variant of arithmetic derivative.

0, 1, 2, 4, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 22, 24, 25, 26, 28, 29, 30, 32, 33, 34, 36, 38, 39, 40, 41, 42, 44, 46, 48, 49, 50, 52, 53, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 67, 68, 69, 70, 72, 74, 76, 78, 79, 80, 81, 82, 84, 86, 88, 90, 92, 93, 94, 95, 96, 97, 98, 100, 102, 104, 105, 106, 107, 108

Offset

1,3

Comments

A multiplicative semigroup: if m and n are in the sequence, then so is m*n.

Links

Antti Karttunen, Table of n, a(n) for n = 1..12000

Index entries for sequences related to prime indices in the factorization of n

Prog

(PARI) isA374049 = A374048;

Crossrefs

Cf. A328846, A374048 (characteristic function), A374050 (complement).

Cf. also A374046.

Sequence in context: A136499 A047513 A039068 * A260399 A229785 A101616

Adjacent sequences: A374046 A374047 A374048 * A374050 A374051 A374052

Keyword

nonn

Author

Antti Karttunen, Jun 28 2024

Status

approved