0,2

Antti Karttunen, Table of n, a(n) for n = 0..32768

Index entries for sequences related to primorial base

a(n) = A007947(A276086(n)).

a(n) = A276086(n) / A328572(n).

a(A276156(n)) = A276086(A276156(n)). [And at no other points the equality holds]

A001221(a(n)) = A267263(n).

(PARI) A328571(n) = { my(m=1, p=2); while(n, m *= (p^!!(n%p)); n = n\p; p = nextprime(1+p)); (m); };

Cf. A001221, A007947, A267263, A276086, A328572.

Cf. A276156 (gives the indices where this coincides with A276086).

Sequence in context: A261814 A240965 A084228 * A275733 A245499 A323642

Adjacent sequences: A328568 A328569 A328570 * A328572 A328573 A328574

nonn

Antti Karttunen, Oct 20 2019

approved