A356319 Numbers k such that {the least j >= k for which k and A276086(k+j) are coprime} is larger than 0, but less than k, where A276086 is the primorial base exp-function.

9, 20, 21, 25, 27, 33, 39, 40, 45, 50, 51, 55, 57, 69, 75, 80, 81, 85, 87, 93, 99, 100, 110, 111, 112, 115, 117, 119, 123, 126, 129, 130, 133, 135, 140, 141, 145, 147, 153, 159, 160, 161, 165, 168, 170, 171, 175, 177, 182, 183, 189, 190, 195, 196, 200, 201, 203, 205, 207, 213, 219, 225, 230, 235, 237, 243, 245, 249

Offset: 1

Author

Antti Karttunen, Nov 04 2022

Keywords

• nonn

Comments

Numbers k for which 0 < A356302(k) < k, or equally, for which k < A356309(k) < 2*k.

Links

• Index entries for sequences related to primorial base

Crossrefs

Subsequence of A356317, which is a subsequence of A324584.

Cf. A276086, A356302, A356309.

Programs

PARI

isA356319(n) = { my(u=A356302(n)); (u && (u