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Search: id:A004331
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| A004331 |
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Binomial coefficient C(4n,n-1). |
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+0
1
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| 1, 8, 66, 560, 4845, 42504, 376740, 3365856, 30260340, 273438880, 2481256778, 22595200368, 206379406870, 1889912732400, 17345898649800, 159518999862720, 1469568786235308, 13559593014190944, 125288932441604200
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 828.
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LINKS
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, December 1972 [alternative scanned copy].
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CROSSREFS
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Sequence in context: A121778 A037501 A037678 this_sequence A147959 A121777 A056621
Adjacent sequences: A004328 A004329 A004330 this_sequence A004332 A004333 A004334
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KEYWORD
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nonn,easy
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AUTHOR
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njas
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