A373602 Numbers k such that the sum of prime factors (with multiplicity) of A276086(k) is a multiple of 3, where A276086 is the primorial base exp-function.

0, 2, 4, 13, 15, 17, 18, 20, 22, 31, 33, 35, 36, 38, 40, 49, 51, 53, 54, 56, 58, 67, 69, 71, 72, 74, 76, 85, 87, 89, 90, 92, 94, 103, 105, 107, 108, 110, 112, 121, 123, 125, 126, 128, 130, 139, 141, 143, 144, 146, 148, 157, 159, 161, 162, 164, 166, 175, 177, 179, 180, 182, 184, 193, 195, 197, 198, 200, 202, 217

Offset: 1

Author

Antti Karttunen, Jun 18 2024

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..20020
• Index entries for sequences related to primorial base

Crossrefs

Positions of multiples of 3 in A373600.

Cf. A002476, A003627, A276086, A373601 (characteristic function).

Programs

PARI

isA373602 = A373601;