A334203 a(n) = A064097(A032742(n)).

0, 0, 0, 1, 0, 2, 0, 2, 2, 3, 0, 3, 0, 4, 3, 3, 0, 4, 0, 4, 4, 5, 0, 4, 3, 5, 4, 5, 0, 5, 0, 4, 5, 5, 4, 5, 0, 6, 5, 5, 0, 6, 0, 6, 5, 7, 0, 5, 4, 6, 5, 6, 0, 6, 5, 6, 6, 7, 0, 6, 0, 7, 6, 5, 5, 7, 0, 6, 7, 7, 0, 6, 0, 7, 6, 7, 5, 7, 0, 6, 6, 7, 0, 7, 5, 8, 7, 7, 0, 7, 5, 8, 7, 9, 6, 6, 0, 8, 7, 7, 0, 7, 0, 7, 7

Offset: 1

Author

Antti Karttunen, May 13 2020

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..65537

Crossrefs

Cf. A020639, A032742, A060681, A064097, A323077.

Programs

PARI

A032742(n) = if(1==n,n,n/vecmin(factor(n)[,1]));
A060681(n) = (n-if(1==n,n,n/vecmin(factor(n)[,1])));
A064097(n) = if(1==n,0,1+A064097(A060681(n)));
A334203(n) = A064097(A032742(n));

Formula

a(n) = A064097(A032742(n)) = A064097(n/A020639(n)).