A144943 a(n) = number of divisors of n^3 (excluding 1 and n^3).

0, 2, 2, 5, 2, 14, 2, 8, 5, 14, 2, 26, 2, 14, 14, 11, 2, 26, 2, 26, 14, 14, 2, 38, 5, 14, 8, 26, 2, 62, 2, 14, 14, 14, 14, 47, 2, 14, 14, 38, 2, 62, 2, 26, 26, 14, 2, 50, 5, 26, 14, 26, 2, 38, 14, 38, 14, 14, 2, 110, 2, 14, 26, 17, 14, 62, 2, 26, 14, 62, 2, 68, 2, 14, 26, 26, 14, 62, 2, 50

Offset: 1

Author

Mark Taggart (mt2612f(AT)aol.com), Sep 26 2008

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..1001

Crossrefs

Cf. A000005, A048785.

Programs

Mathematica

Join[{0},(DivisorSigma[0,#]-2)&/@(Range[2,90]^3)]  (* Harvey P. Dale, Apr 02 2011 *)

PARI

A144943(n) = if(1==n,0,numdiv(n^3)-2); \\ Antti Karttunen, May 19 2017

Formula

For n > 1, a(n) = A048785(n) - 2. - Antti Karttunen, May 19 2017