A328583 a(n) = A023900(A276086(n)).

1, -1, -2, 2, -2, 2, -4, 4, 8, -8, 8, -8, -4, 4, 8, -8, 8, -8, -4, 4, 8, -8, 8, -8, -4, 4, 8, -8, 8, -8, -6, 6, 12, -12, 12, -12, 24, -24, -48, 48, -48, 48, 24, -24, -48, 48, -48, 48, 24, -24, -48, 48, -48, 48, 24, -24, -48, 48, -48, 48, -6, 6, 12, -12, 12, -12, 24, -24, -48, 48, -48, 48, 24, -24, -48, 48, -48, 48, 24, -24

Offset: 0

Author

Antti Karttunen, Oct 21 2019

Keywords

• sign

Links

• Antti Karttunen, Table of n, a(n) for n = 0..32768
• Index entries for sequences related to primorial base

Crossrefs

Cf. A023900, A276086, A324650, A328572.

Programs

PARI

A328583(n) = { my(m=1, p=2); while(n, m *= (1-p)^!!(n%p); n = n\p; p = nextprime(1+p)); (m); };

Formula

a(n) = A023900(A276086(n)).

abs(a(n)) = A324650(n) / A328572(n).