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 A295471 a(n) = (20*n)!*n!/((10*n)!*(8*n)!*(3*n)!). 2
 1, 2771340, 44524428808860, 835982760936614190900, 16702642470437308383606668060, 345116202503279265243707597937393840, 7282855378270617096441349556073829143864900, 155927544469969434644890704895476696960247603510200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..7. FORMULA G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/8, 1/3, 3/8, 1/2, 5/8, 2/3, 7/8], 625000000/27*x). MATHEMATICA Table[((20n)!n!)/((10n)!(8n)!(3n)!), {n, 0, 10}] (* Harvey P. Dale, Feb 03 2021 *) CROSSREFS Cf. A295431. Sequence in context: A306634 A015336 A251835 * A316487 A250535 A203912 Adjacent sequences: A295468 A295469 A295470 * A295472 A295473 A295474 KEYWORD nonn AUTHOR Gheorghe Coserea, Nov 28 2017 STATUS approved

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Last modified September 18 14:14 EDT 2024. Contains 376000 sequences. (Running on oeis4.)