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A170829 a(n) = GCD(Catalan(n), n!). 0
1, 1, 2, 1, 2, 6, 12, 3, 10, 2, 4, 14, 28, 100, 360, 45, 90, 330, 23100, 2310, 8580, 780, 1560, 5850, 468, 1764, 6664, 476, 52360, 198968, 397936, 24871, 94962, 363090, 20748, 79534, 159068, 8372, 32200, 123970, 247940, 956340, 1912680, 7389900, 28574280, 1242360 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..45.

CROSSREFS

Cf. A000108.

Sequence in context: A131804 A254198 A246466 * A032085 A032163 A038078

Adjacent sequences:  A170826 A170827 A170828 * A170830 A170831 A170832

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 28 2009

STATUS

approved

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Last modified February 23 13:38 EST 2018. Contains 299581 sequences. (Running on oeis4.)