A370123 Numbers whose second arithmetic derivative (A068346) is a multiple of 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

Author

Antti Karttunen, Feb 10 2024

Keywords

• nonn

Crossrefs

Cf. A068346, A370119 (subsequence), A370122 (characteristic function).

Programs

PARI

\\ See A370122.