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

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

David A. Corneth, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Catalan Number

Example

70 = 5*14 = C(3)*C(4). - David A. Corneth, Mar 26 2021

Crossrefs

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

Sequence in context: A174989 A190809 A067941 * A182195 A092265 A262937

Adjacent sequences: A259708 A259709 A259710 * A259712 A259713 A259714

Keyword

nonn

Author

Ilya Gutkovskiy, Apr 14 2020

Status

approved