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Search: id:A100520
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| A100520 |
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Numerator of Sum_{k=0..2n} (-1)^k/C(2n,k)^2. |
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+0
3
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| 1, 7, 137, 2341, 38629, 1257937, 50881679, 164078209, 18480100619, 1187779852639, 4086043585673, 46823724627623, 825926870076593, 8826243587390221, 6435629123661395137, 721766119107018403553, 5255377541226932317019, 19239461977895120106181, 2618947765106118753941303
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OFFSET
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0,2
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EXAMPLE
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1, 7/4, 137/72, 2341/1200, 38629/19600, 1257937/635040, 50881679/25613280, 164078209/82450368, 18480100619/9275666400, 1187779852639/595703908800, ... = A100520/A100521
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CROSSREFS
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Cf. A100521.
Sequence in context: A081793 A051504 A058881 this_sequence A009701 A120052 A142295
Adjacent sequences: A100517 A100518 A100519 this_sequence A100521 A100522 A100523
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KEYWORD
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nonn,frac
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 25 2004
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EXTENSIONS
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Definition corrected by Alexander Adamchuk, May 11 2007
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