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A259711
Numbers that can be written as a product of Catalan numbers.
2
1, 2, 4, 5, 8, 10, 14, 16, 20, 25, 28, 32, 40, 42, 50, 56, 64, 70, 80, 84, 100, 112, 125, 128, 132, 140, 160, 168, 196, 200, 210, 224, 250, 256, 264, 280, 320, 336, 350, 392, 400, 420, 429, 448, 500, 512, 528, 560, 588, 625, 640, 660, 672, 700, 784, 800, 840
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Catalan Number
EXAMPLE
70 = 5*14 = C(3)*C(4). - David A. Corneth, Mar 26 2021
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Apr 14 2020
STATUS
approved