A358226 Numbers k such that A276086(k) mod k is an even number, where A276086 is the primorial base exp-function.

1, 3, 11, 15, 17, 25, 27, 31, 43, 51, 57, 59, 63, 71, 75, 77, 83, 85, 87, 93, 95, 103, 105, 107, 109, 115, 119, 129, 133, 137, 139, 145, 147, 151, 157, 167, 169, 171, 173, 175, 177, 185, 189, 191, 199, 201, 207, 211, 213, 215, 217, 221, 223, 229, 233, 235, 237, 241, 257, 259, 263, 269, 281, 289, 299, 303, 305, 307

Offset: 1

Author

Antti Karttunen, Nov 25 2022

Keywords

• nonn

Comments

All terms are odd.

Links

• Index entries for sequences related to primorial base

Crossrefs

Cf. A276086, A328386, A328387 (subsequence), A358225 (complement).

Positions of zeros in A358224.

Cf. also A358229.

Programs

PARI

A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A358224(n) = ((A276086(n)%n)%2);
isA358226(n) = !A358224(n);

Formula

{k | A328386(k) == 0 (mod 2)}.