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A001194
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Expansion of an integral.
(Formerly M2826 N1139)
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0
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3, 9, 54, 450, 4725, 59535, 873180, 14594580, 273648375, 5685805125, 129636356850, 3217338674550, 86331921100425, 2490343877896875, 76844896803675000, 2525635608280785000, 88081541838792376875, 3248654513701342370625
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OFFSET
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2,1
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 167.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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Table of n, a(n) for n=2..19.
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FORMULA
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a(n)=(2n-1)a(n-1)-3(n-1)(2n-7)!!, n>2. [Sean A. Irvine, Mar 23 2012]
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CROSSREFS
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Sequence in context: A175596 A212418 A025226 * A032179 A175117 A183303
Adjacent sequences: A001191 A001192 A001193 * A001195 A001196 A001197
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane.
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EXTENSIONS
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More terms from Sean A. Irvine, Mar 22 2012
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STATUS
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approved
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