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Search: id:A127231
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| A127231 |
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a(n)= numerator of ((2n)! + 1)/(n!). |
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+0
1
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| 3, 25, 721, 40321, 3628801, 479001601, 87178291201, 20922789888001, 6402373705728001, 2432902008176640001, 1124000727777607680001, 620448401733239439360001, 403291461126605635584000001
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OFFSET
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1,1
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MATHEMATICA
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Table[Numerator[((2n)! + 1)/(n!)], {n, 1, 30}]
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CROSSREFS
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Cf. A028387, A062938, A127227, A127228, A127229, A127230.
Sequence in context: A136173 A003024 A131310 this_sequence A062411 A136516 A002021
Adjacent sequences: A127228 A127229 A127230 this_sequence A127232 A127233 A127234
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KEYWORD
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nonn,frac
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Jan 09 2007
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