A369962 Numbers k for which gcd(k, A003415(k)) is equal to gcd(k, A276086(k)), where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.

1, 2, 5, 6, 7, 9, 11, 13, 14, 17, 19, 22, 23, 26, 29, 30, 31, 34, 37, 38, 41, 43, 46, 47, 49, 53, 58, 59, 61, 62, 65, 66, 67, 71, 73, 74, 78, 79, 82, 83, 86, 89, 94, 95, 97, 99, 101, 102, 103, 106, 107, 109, 113, 114, 117, 118, 122, 127, 131, 134, 137, 138, 139, 142, 143, 146, 149, 151, 153, 155, 157, 158, 163, 166

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..11343

Index entries for sequences related to primorial base

Formula

{k | A085731(k) == A324198(k)}.

Prog

(PARI) \\ See A369961.

Crossrefs

Cf. A003415, A085731, A276086, A324198, A369961 (characteristic function).

Subsequences: A045344, A369959, A369963 (nonsquarefree terms).

Sequence in context: A177859 A047580 A153384 * A102657 A202115 A047324

Adjacent sequences: A369959 A369960 A369961 * A369963 A369964 A369965

Keyword

nonn

Author

Antti Karttunen, Feb 07 2024

Status

approved