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A374122
Numbers k for which A328845(k) is a multiple of 3, where A328845 is the first Fibonacci-based variant of the arithmetic derivative.
7
0, 1, 8, 9, 10, 14, 18, 22, 27, 36, 45, 52, 54, 58, 62, 63, 64, 65, 68, 72, 76, 80, 81, 85, 90, 91, 92, 95, 99, 100, 106, 108, 112, 115, 117, 118, 119, 125, 126, 133, 135, 140, 143, 144, 146, 148, 153, 158, 161, 162, 164, 166, 171, 172, 175, 176, 180, 185, 187, 188, 189, 194, 196, 198, 202, 205, 206, 207, 209, 214, 215
OFFSET
1,3
COMMENTS
A multiplicative semigroup: if m and n are in the sequence, then so is m*n.
LINKS
PROG
(PARI) isA374122 = A374121;
CROSSREFS
Cf. A328845, A374121 (characteristic function).
Cf. also A374046, A374052.
Sequence in context: A154967 A271211 A341044 * A072381 A046415 A358674
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 28 2024
STATUS
approved