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Search: id:A000807
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| A000807 |
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Quadratic invariants.
(Formerly M2071 N0819)
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+0
4
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| 1, 2, 14, 182, 3614, 99302, 3554894, 159175382, 8654995454, 558786468422, 42086200603694, 3645412584724022, 358877175474325214, 39758874175808713382, 4915216680878167372814, 673139563824188490513302
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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J. Touchard, Nombres exponentiels et nombres de Bernoulli, Canad. J. Math., 8 (1956), 305-320.
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FORMULA
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E.g.f.: exp(exp(x)+exp(-x)-2). a(n) = Sum_{k=0..n} (-1)^k*binomial(n, k)*A000110(k)*A000110(n-k). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 08 2002
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CROSSREFS
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Adjacent sequences: A000804 A000805 A000806 this_sequence A000808 A000809 A000810
Sequence in context: A046247 A141012 A109520 this_sequence A074655 A067902 A132611
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 08 2002
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