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A008979 (6n)!/(n!)^6. 2
1, 720, 7484400, 137225088000, 3246670537110000, 88832646059788350720, 2670177736637149247308800, 85722533226982363751829504000, 2889253496242619386328267523990000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A010799 A075754 A143476 * A158044 A181751 A151596

Adjacent sequences:  A008976 A008977 A008978 * A008980 A008981 A008982

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 19 14:42 EDT 2014. Contains 240761 sequences.