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A058699 a(n) = p(p(n)), p = partition numbers A000041. 8
1, 1, 2, 3, 7, 15, 56, 176, 1002, 5604, 53174, 526823, 10619863, 214481126, 9035836076, 476715857290, 51820051838712, 7479565078510584, 2645418340688763701, 1318520401612270233223, 1774758704783877366657989, 4025091510519029370421431033 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..50

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

Cf. A000009, A000041, A284908, A284909, A284910.

Sequence in context: A110888 A133736 A058698 * A250193 A004782 A049956

Adjacent sequences:  A058696 A058697 A058698 * A058700 A058701 A058702

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 31 2000

STATUS

approved

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Last modified September 28 17:43 EDT 2020. Contains 337393 sequences. (Running on oeis4.)