A374038 Numbers k such that A328845(k) and A328846(k) are not both even, where A328845 and A328846 are the first and second Fibonacci-based variants of the arithmetic derivative.

2, 3, 5, 6, 7, 10, 11, 13, 14, 15, 17, 18, 19, 21, 22, 23, 26, 27, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 45, 46, 47, 50, 51, 53, 54, 57, 58, 59, 61, 62, 63, 66, 67, 69, 70, 71, 73, 74, 75, 77, 78, 79, 82, 83, 85, 86, 87, 89, 90, 91, 93, 94, 97, 98, 99, 101, 102, 103, 106, 107, 109, 110, 111, 113, 114, 117

Offset: 1

Author

Antti Karttunen, Jun 28 2024

Keywords

• nonn

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

Union of A374047 and A374050.

Cf. A328845, A328846, A374036, A374037 (complement).

Programs

PARI

isA374038(n) = !A374036(n);