OFFSET
1,7
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Distinct Prime Factors
Eric Weisstein's World of Mathematics, Partition Function
Wikipedia, Partition function
EXAMPLE
MATHEMATICA
Table[If[n==1, 0, Length[FactorInteger[PartitionsP[n]]]], {n, 1, 100}] (* Jonathan Sondow, Aug 19 2011 *)
PROG
(PARI) a(n)={omega(numbpart(n))} \\ Andrew Howroyd, Dec 28 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Aug 23 2003
STATUS
approved