A369641 Composite numbers k such that k' is a sum of distinct primorial numbers, where k' stands for the arithmetic derivative of k, A003415.

9, 10, 14, 15, 16, 28, 30, 45, 58, 62, 74, 87, 108, 112, 136, 155, 161, 189, 198, 203, 209, 210, 212, 217, 221, 225, 236, 244, 246, 247, 282, 290, 299, 323, 361, 374, 399, 422, 435, 478, 482, 507, 717, 1055, 1205, 1477, 1480, 1631, 1673, 1687, 1940, 2132, 2189, 2212, 2308, 2356, 2519, 2524, 2561, 2587, 2655, 2766

Offset: 1

Author

Antti Karttunen, Jan 31 2024

Keywords

• nonn

Comments

Composite terms of A341518, i.e., composite numbers k such that A327859(k) = A276086(A003415(k)) is squarefree number, or equally, k' is in A276156.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..20054 (terms less than 2^30)

Crossrefs

Setwise difference A341518 \ A158611.

Cf. A003415, A276086, A276156, A327859, A341517, A369640 (characteristic function).

Cf. A327978, A328243, A369642 (subsequences).

Programs

PARI

\\ See A369640