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

1,2

Links

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

Formula

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

Mathematica

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

Prog

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

Crossrefs

Cf. A000005, A048785.

Sequence in context: A303073 A068058 A192233 * A114976 A085483 A271654

Adjacent sequences: A144940 A144941 A144942 * A144944 A144945 A144946

Keyword

nonn

Author

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

Status

approved