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A259711 Numbers that can be written as a product of Catalan numbers. 2


%S 1,2,4,5,8,10,14,16,20,25,28,32,40,42,50,56,64,70,80,84,100,112,125,

%T 128,132,140,160,168,196,200,210,224,250,256,264,280,320,336,350,392,

%U 400,420,429,448,500,512,528,560,588,625,640,660,672,700,784,800,840

%N Numbers that can be written as a product of Catalan numbers.

%H David A. Corneth, <a href="/A259711/b259711.txt">Table of n, a(n) for n = 1..10000</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CatalanNumber.html">Catalan Number</a>

%e 70 = 5*14 = C(3)*C(4). - _David A. Corneth_, Mar 26 2021

%Y Cf. A000108, A001013, A003046, A005568, A014228, A259711, A342288.

%K nonn

%O 1,2

%A _Ilya Gutkovskiy_, Apr 14 2020

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Last modified August 1 14:14 EDT 2021. Contains 346391 sequences. (Running on oeis4.)