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

Author

Antti Karttunen, Jun 28 2024

Keywords

• nonn

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

Crossrefs

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

Cf. also A374046.

Programs

PARI

isA374049 = A374048;