OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
EXAMPLE
a(7) = d(d(7!)) = d(60) = 12;
a(8) = d(d(8!)) = d(96) = 12.
MATHEMATICA
DivisorSigma[0, DivisorSigma[0, Range[60]!]] (* Harvey P. Dale, May 20 2013 *)
PROG
(PARI) a(n) = numdiv(numdiv(n!)); \\ Michel Marcus, May 01 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Feb 24 2000
STATUS
approved