A295454 a(n) = (30*n)!*(9*n)!*(5*n)!/((18*n)!*(15*n)!*(10*n)!*n!).

1, 380190, 402651263238, 481367742667183020, 606773455031055915223110, 788038286971309455244327103940, 1043296916338880227942329375359295900, 1399861754063759689631089578666777998208024, 1896931228304326042693101941956800377403844620870

Offset

0,2

Links

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

Formula

G.f.: hypergeom([1/30, 7/30, 11/30, 13/30, 17/30, 19/30, 23/30, 29/30], [1/18, 5/18, 7/18, 1/2, 11/18, 13/18, 17/18], 39062500/27*x).

Crossrefs

Cf. A295431.

Sequence in context: A159265 A133976 A286009 * A273772 A206365 A271323

Adjacent sequences: A295451 A295452 A295453 * A295455 A295456 A295457

Keyword

nonn

Author

Gheorghe Coserea, Nov 27 2017

Status

approved