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Search: id:A067700
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| A067700 |
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2*(n^2)!*product_{k=0..n-1} k!/(n+k)! |
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+0
2
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| 2, 2, 4, 84, 48048, 1402298040, 3343286067469920, 950147368528779758457120, 44162749985403900797695349661715200, 440762756830149092247907829817237094171949712000
(list; graph; listen)
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OFFSET
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0,1
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CROSSREFS
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A079402(n) = (a(n)/2)^2.
Sequence in context: A088895 A075806 A050923 this_sequence A037010 A114695 A134084
Adjacent sequences: A067697 A067698 A067699 this_sequence A067701 A067702 A067703
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KEYWORD
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nonn,easy
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 05 2002
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EXTENSIONS
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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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