A383303 Numbers k such that A276086(A276086(k)) is a multiple of A276086(A003415(k)), where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.

0, 1, 2, 6, 8, 10, 14, 22, 26, 28, 40, 50, 56, 58, 62, 68, 72, 74, 82, 86, 91, 92, 94, 95, 102, 118, 122, 124, 134, 136, 142, 144, 146, 155, 160, 174, 178, 185, 194, 196, 202, 206, 208, 215, 217, 220, 221, 225, 236, 246, 247, 253, 259, 268, 270, 272, 280, 282, 290, 295, 296, 300, 302, 305, 318, 330, 335, 340, 344

Offset: 1

Author

Antti Karttunen, May 15 2025

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..20000
• Index entries for sequences related to primorial base.

Crossrefs

Cf. A003415, A276086, A276087, A327859, A383302 (characteristic function), A383933 (subsequence).

Cf. also A383299.

Programs

PARI

isA383303 = A383302;