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A370123
Numbers whose second arithmetic derivative (A068346) is a multiple of 3.
3
0, 1, 2, 3, 5, 7, 11, 13, 14, 15, 17, 19, 23, 24, 27, 29, 31, 33, 37, 40, 41, 43, 47, 48, 49, 50, 51, 53, 54, 56, 59, 60, 61, 65, 67, 68, 69, 71, 73, 77, 79, 81, 83, 86, 89, 91, 97, 98, 101, 103, 104, 107, 108, 109, 113, 122, 123, 127, 131, 132, 133, 135, 136, 137, 139, 140, 141, 149, 150, 151, 152, 155, 157, 158
OFFSET
1,3
PROG
(PARI) \\ See A370122.
CROSSREFS
Cf. A068346, A370119 (subsequence), A370122 (characteristic function).
Sequence in context: A072698 A034442 A077620 * A275721 A007933 A032524
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 10 2024
STATUS
approved