A356312 Numbers k such that A003415(k) and A276086(k) are not relatively prime, where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.

1, 6, 8, 9, 14, 15, 20, 21, 25, 26, 27, 33, 35, 36, 38, 39, 44, 45, 46, 48, 49, 50, 51, 52, 55, 57, 62, 63, 64, 65, 68, 69, 74, 75, 76, 77, 81, 85, 86, 87, 88, 91, 92, 93, 94, 95, 98, 99, 100, 102, 106, 110, 111, 112, 115, 116, 117, 119, 121, 122, 123, 125, 126, 128, 129, 133, 134, 135, 141, 143, 145, 146, 147, 153

Offset: 1

Author

Antti Karttunen, Nov 03 2022

Keywords

• nonn

Links

• Index entries for sequences related to primorial base

Crossrefs

Positions of terms <> 1 in A327858. Positions of 0's in A356310.

Cf. A003415, A046337 (subsequence), A276086, A356311 (complement).

Cf. also A324584.

Programs

PARI

isA356312(n) = !A356310(n); \\ See code in A356310.