A353563 Primorial base exp-function applied to Euler totient function: a(n) = A276086(phi(n)).

2, 2, 3, 3, 9, 3, 5, 9, 5, 9, 45, 9, 25, 5, 15, 15, 225, 5, 125, 15, 25, 45, 1125, 15, 375, 25, 125, 25, 5625, 15, 7, 225, 375, 225, 625, 25, 35, 125, 625, 225, 315, 25, 175, 375, 625, 1125, 1575, 225, 175, 375, 21, 625, 7875, 125, 315, 625, 35, 5625, 39375, 225, 49, 7, 35, 21, 875, 375, 245, 21, 525, 625, 2205, 625

Offset: 1

Author

Antti Karttunen, Apr 27 2022

Keywords

• nonn
• look

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to primorial base

Crossrefs

Cf. A000010, A276086, A353564, A353565.

Cf. also A324650, A332825.

Programs

PARI

A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A353563(n) = A276086(eulerphi(n));

Formula

a(n) = A276086(A000010(n)).