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Search: id:A100521
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| A100521 |
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Denominator of Sum_{k=0..2n} (-1)^k/C(2n,k)^2. |
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+0
2
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| 1, 4, 72, 1200, 19600, 635040, 25613280, 82450368, 9275666400, 595703908800, 2048086772160, 23459903026560, 413676290035008, 4419618483280000, 3221901874311120000, 361282596839420256000, 2630246784565779288000, 9628029406360113091200, 1310481780310126504080000
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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. A100520.
Adjacent sequences: A100518 A100519 A100520 this_sequence A100522 A100523 A100524
Sequence in context: A119580 A139745 A066992 this_sequence A111868 A060645 A003718
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KEYWORD
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nonn,frac
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AUTHOR
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njas, Nov 25 2004
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EXTENSIONS
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Definition corrected by Alexander Adamchuk, May 11 2007
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