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A079929 a(n)=(3*n+1)!/(n!*3^n). 0
1, 8, 280, 22400, 3203200, 717516800, 231757926400, 101973487616000, 58634755379200000, 42686101916057600000, 38374805622535782400000, 41751788517318931251200000, 54068566129928015970304000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

FORMULA

In Maple notation, hypergeometric generating function sum(a(n)*x^n/(n!)^2, n=0..infinity) = hypergeom([2/3, 4/3], [1], 9*x)

CROSSREFS

Sequence in context: A281763 A280761 A247215 * A226415 A226346 A217488

Adjacent sequences:  A079926 A079927 A079928 * A079930 A079931 A079932

KEYWORD

nonn

AUTHOR

Karol A. Penson, Jan 16 2003

STATUS

approved

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Last modified August 11 18:37 EDT 2020. Contains 336428 sequences. (Running on oeis4.)