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A374108
Numbers k such that A113177(k) and A328845(k) are both even, where A113177 is fully additive with a(p) = Fibonacci(p) and A328845 is the first Fibonacci-based variant of the arithmetic derivative.
4
1, 3, 4, 9, 12, 16, 25, 27, 35, 36, 40, 48, 49, 55, 56, 64, 65, 75, 77, 81, 85, 88, 91, 95, 100, 104, 105, 108, 115, 119, 120, 121, 133, 136, 140, 143, 144, 145, 147, 152, 155, 160, 161, 165, 168, 169, 184, 185, 187, 192, 195, 196, 203, 205, 209, 215, 217, 220, 221, 224, 225, 231, 232, 235, 243, 247, 248, 253, 255, 256
OFFSET
1,2
COMMENTS
A multiplicative semigroup: if m and n are in the sequence, then so is m*n.
LINKS
PROG
(PARI) isA374108 = A374107;
CROSSREFS
Cf. A113177, A328845, A374107 (characteristic function), A374109 (complement).
Indices of even terms in A374106.
Intersection of A373586 and A374046.
Sequence in context: A105137 A243185 A336166 * A374114 A230781 A025613
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 29 2024
STATUS
approved