A353466 Numbers k for which A276086(k) is of the form 4k+3.

2, 8, 14, 20, 26, 30, 34, 36, 40, 42, 46, 48, 52, 54, 58, 62, 68, 74, 80, 86, 90, 94, 96, 100, 102, 106, 108, 112, 114, 118, 122, 128, 134, 140, 146, 150, 154, 156, 160, 162, 166, 168, 172, 174, 178, 182, 188, 194, 200, 206, 210, 214, 216, 220, 222, 226, 228, 232, 234, 238, 242, 248, 254, 260, 266, 270, 274, 276

Offset: 1

Author

Antti Karttunen, Apr 24 2022

Keywords

• nonn
• base

Links

• Index entries for sequences related to primorial base

Crossrefs

Cf. A276086, A353486, A353489 (characteristic function).

Sequences A005408, A353465 and this sequence partition the natural numbers to three disjoint sets.

Programs

PARI

A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A353489(n) = (3==(A276086(n)%4));
isA353466(n) = A353489(n);