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A127231
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a(n)= numerator of ((2n)! + 1)/(n!).
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0
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3, 25, 721, 40321, 3628801, 479001601, 87178291201, 20922789888001, 6402373705728001, 2432902008176640001, 1124000727777607680001, 620448401733239439360001, 403291461126605635584000001
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Table[Numerator[((2n)! + 1)/(n!)], {n, 1, 30}]
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CROSSREFS
| Cf. A028387, A062938, A127227, A127228, A127229, A127230.
Sequence in context: A003024 A179473 A131310 * A062411 A136516 A002021
Adjacent sequences: A127228 A127229 A127230 * A127232 A127233 A127234
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KEYWORD
| nonn,frac
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Jan 09 2007
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