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Search: id:A054201
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| A054201 |
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(n-1)! Sum{k=1 to n} k^k/k!. |
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+0
2
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| 1, 3, 15, 109, 1061, 13081, 196135, 3470097, 70807497, 1637267473, 42310099331, 1208419463329, 37799118682429, 1285103316125721, 47184372451150719, 1860687091374107761, 78432185337652592657, 3519258710478790607137
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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-LambertW(-x)/(1+LambertW(-x))/(1-x) = Sum_{n>0} a(n)*x^n/(n-1)!. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 26 2002
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EXAMPLE
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a(3) = 2! *(1^1/1! +2^2/2! +3^3/3!) = 2 *(1/1 +4/2 + 27/6) = 15
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CROSSREFS
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Cf. A054202.
Sequence in context: A090351 A136221 A110328 this_sequence A090355 A083483 A089468
Adjacent sequences: A054198 A054199 A054200 this_sequence A054202 A054203 A054204
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KEYWORD
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nonn,easy
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Apr 29 2000
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