A328573 a(n) = A328475(n) / A328572(n).

1, 1, 3, 1, 3, 1, 5, 5, 15, 1, 15, 1, 5, 5, 15, 1, 15, 1, 5, 5, 15, 1, 15, 1, 5, 5, 15, 1, 15, 1, 7, 7, 21, 7, 21, 7, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 7, 7, 21, 7, 21, 7, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 35, 35, 105, 1, 105, 1, 7, 7, 21, 7, 21

Offset: 0

Author

Antti Karttunen, Oct 20 2019

Keywords

• nonn

Links

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

Crossrefs

Cf. A002110, A276086, A328475, A328572, A328580.

Cf. A328574 (positions of 1's).

Programs

PARI

A328475(n) = { my(m=1, p=2, y=1); while(n, if(n%p, m *= p^((n%p)-y), y=0); n = n\p; p = nextprime(1+p)); (m); };
A328572(n) = { my(m=1, p=2); while(n, if(n%p, m *= p^((n%p)-1)); n = n\p; p = nextprime(1+p)); (m); };
A328573(n) = (A328475(n) / A328572(n));

Formula

a(n) = A328475(n) / A328572(n).