A295472 a(n) = (20*n)!*(3*n)!*(2*n)!/((10*n)!*(8*n)!*(6*n)!*n!).

1, 277134, 289119667590, 343884311368413900, 432365948166678100986950, 560667054442505107362561718884, 741516037730263944066134968787982492, 994213662322534065297017671627388489353560, 1346503768567844163328344622811399413074559930950

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Formula

G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/8, 1/6, 3/8, 1/2, 5/8, 5/6, 7/8], 39062500/27*x).

Crossrefs

Cf. A295431.

Sequence in context: A157839 A237808 A271349 * A162765 A186879 A224252

Adjacent sequences: A295469 A295470 A295471 * A295473 A295474 A295475

Keyword

nonn

Author

Gheorghe Coserea, Nov 28 2017

Status

approved