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A093434
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a(n) = product of 2n distinct numbers, n just less than 2n and n just more than 2n.
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0
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3, 180, 30240, 9979200, 5448643200, 4446092851200, 5068545850368000, 7694052600858624000, 15003402571674316800000, 36548288664598635724800000, 108767707065845539917004800000, 388300714225068577503707136000000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The arithmetic mean of these numbers is 2n.
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EXAMPLE
| a(3) = (3*4*5)*(7*8*9).
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MATHEMATICA
| Table[(3n)!/(2n*(n - 1)!), {n, 12}] (from Robert G. Wilson v Apr 24 2004)
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CROSSREFS
| Sequence in context: A113270 A091324 A198446 * A053291 A013519 A042779
Adjacent sequences: A093431 A093432 A093433 * A093435 A093436 A093437
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 01 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 24 2004
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