A373255 Numbers k for which A003415(k) == +1 (mod 3), where A003415 is the arithmetic derivative.

2, 3, 4, 5, 7, 10, 11, 12, 13, 17, 19, 21, 22, 23, 25, 29, 30, 31, 34, 37, 39, 41, 43, 46, 47, 48, 53, 55, 57, 58, 59, 61, 66, 67, 71, 73, 75, 79, 82, 83, 84, 85, 89, 93, 94, 97, 101, 102, 103, 106, 107, 109, 111, 113, 115, 118, 120, 121, 127, 128, 129, 131, 137, 138, 139, 142, 145, 147, 149, 151, 156, 157, 163

Offset: 1

Author

Antti Karttunen, May 31 2024

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000

Crossrefs

Positions of +1's in A373253.

Cf. A000040 (subsequence), A003415, A373254 (characteristic function).

Programs

PARI

isA373255 = A373254;