A016002 a(n) = (tau(n^7)+6)/7.

1, 2, 2, 3, 2, 10, 2, 4, 3, 10, 2, 18, 2, 10, 10, 5, 2, 18, 2, 18, 10, 10, 2, 26, 3, 10, 4, 18, 2, 74, 2, 6, 10, 10, 10, 33, 2, 10, 10, 26, 2, 74, 2, 18, 18, 10, 2, 34, 3, 18, 10, 18, 2, 26, 10, 26, 10, 10, 2, 138, 2, 10, 18, 7, 10, 74, 2, 18, 10, 74, 2, 48, 2, 10, 18, 18

Offset: 1

Author

Robert G. Wilson v

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000005, A015996, A015999, A016001, A016003, A016005-A016009, A016012.

Programs

Mathematica

(DivisorSigma[0,Range[80]^7]+6)/7 (* Harvey P. Dale, Jul 27 2012 *)

PARI

A016002(n) = (numdiv(n^7)+6)/7;
for(n=1, 10000, write("b016002.txt", n, " ", A016002(n)));
\\ Antti Karttunen, Jan 17 2017

Extensions

Definition corrected by Vladeta Jovovic, Sep 03 2005