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A067700
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2*(n^2)!*product_{k=0..n-1} k!/(n+k)!
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1
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2, 2, 4, 84, 48048, 1402298040, 3343286067469920, 950147368528779758457120, 44162749985403900797695349661715200, 440762756830149092247907829817237094171949712000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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CROSSREFS
| A079402(n) = (a(n)/2)^2.
Sequence in context: A177956 A178981 A050923 * A037010 A114695 A134084
Adjacent sequences: A067697 A067698 A067699 * A067701 A067702 A067703
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KEYWORD
| nonn,easy
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AUTHOR
| Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 05 2002
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EXTENSIONS
| The original definition was unclear (at least to me) and the explicit formula provided did not match the sequence. The new definition was provided by Robert G. Wilson v and is a close match to the beginning of the old version. - N. J. A. Sloane (njas(AT)research.att.com), Feb 10, 2002
Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Jan 06 2003
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