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A289679 a(n) = Catalan(n-1)*Bell(n). 2
1, 2, 10, 75, 728, 8526, 115764, 1776060, 30240210, 563870450, 11397261720, 247700513242, 5750374629244, 141819106313800, 3698639651089800, 101603353693132215, 2929908721122796680, 88427704298354261610, 2785943404258558905900, 91410200883108291556680, 3117102657076175159955420 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..446

Paul Tarau, A Hiking Trip Through the Orders of Magnitude: Deriving Efficient Generators for Closed Simply-Typed Lambda Terms and Normal Forms, arXiv preprint arXiv:1608.03912 [cs.PL], 2016. See Example 5.

MATHEMATICA

Array[CatalanNumber[# - 1] BellB[#] &, 21] (* Michael De Vlieger, Aug 04 2017 *)

CROSSREFS

Cf. A000108, A000110, A064299, A289680.

Sequence in context: A191812 A059104 A094071 * A136222 A184356 A292631

Adjacent sequences:  A289676 A289677 A289678 * A289680 A289681 A289682

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 04 2017

STATUS

approved

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)