This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A289679 #25 Oct 15 2024 15:42:58 %S A289679 1,2,10,75,728,8526,115764,1776060,30240210,563870450,11397261720, %T A289679 247700513242,5750374629244,141819106313800,3698639651089800, %U A289679 101603353693132215,2929908721122796680,88427704298354261610,2785943404258558905900,91410200883108291556680,3117102657076175159955420 %N A289679 a(n) = Catalan(n-1)*Bell(n). %H A289679 Michael De Vlieger, <a href="/A289679/b289679.txt">Table of n, a(n) for n = 1..446</a> %H A289679 Pierre Lescanne, <a href="https://arxiv.org/abs/2104.06723">Zaionc paradox revisited</a>, arXiv:2104.06723 [cs.LO], 2021. %H A289679 Paul Tarau, <a href="https://arxiv.org/abs/1608.03912">A Hiking Trip Through the Orders of Magnitude: Deriving Efficient Generators for Closed Simply-Typed Lambda Terms and Normal Forms</a>, arXiv preprint arXiv:1608.03912 [cs.PL], 2016. See Example 5. %H A289679 Paul Tarau and Valeria de Paiva, <a href="https://vcvpaiva.github.io/includes/pubs/2020-tarau.pdf">Deriving Theorems in Implicational Linear Logic, Declaratively</a>, (2020). %t A289679 Array[CatalanNumber[# - 1] BellB[#] &, 21] (* _Michael De Vlieger_, Aug 04 2017 *) %o A289679 (Python) %o A289679 from sympy.functions.combinatorial.numbers import bell, catalan %o A289679 def A289679(n): return catalan(n-1)*bell(n) # _Chai Wah Wu_, Oct 15 2024 %Y A289679 Cf. A000108, A000110, A064299, A289680. %K A289679 nonn %O A289679 1,2 %A A289679 _N. J. A. Sloane_, Aug 04 2017