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URL: https://oeis.org/A058699

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A058699
a(n) = p(p(n)), p = partition numbers A000041.
10
1, 1, 2, 3, 7, 15, 56, 176, 1002, 5604, 53174, 526823, 10619863, 214481126, 9035836076, 476715857290, 51820051838712, 7479565078510584, 2645418340688763701, 1318520401612270233223, 1774758704783877366657989, 4025091510519029370421431033
OFFSET
0,3
LINKS
FORMULA
a(n) = A000041(A000041(n)). - Omar E. Pol, Apr 25 2016
MAPLE
a:= n-> (combinat[numbpart]@@2)(n):
seq(a(n), n=0..22); # Alois P. Heinz, Apr 05 2017
MATHEMATICA
Table[Nest[PartitionsP, n, 2], {n, 0, 20}] (* Michael De Vlieger, Apr 25 2016 *)
PROG
(PARI) a(n) = numbpart(numbpart(n)); \\ Michel Marcus, Apr 25 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 31 2000
STATUS
approved