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A158455
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a(n) = 2^(n-1)*(n-1)!*(4*n+1).
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0
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5, 18, 104, 816, 8064, 96000, 1336320, 21288960, 381911040, 7617576960, 167215104000, 4005730713600, 103985499340800, 2907670000435200, 87128076504268800, 2785241789890560000, 94612521108897792000, 3403308368004120576000, 129232476659005784064000
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OFFSET
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1,1
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COMMENTS
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Exponential (EXP) transform of a(n) is A093620.
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LINKS
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FORMULA
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E.g.f.: Sum_{n>=1} a(n)*x^n/n! = 4*x/(1-2*x)-(1/2)*log(1-2*x).
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MATHEMATICA
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PROG
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(Magma) [2^(n-1)*Factorial(n-1)*(4*n+1): n in [1..25]]; // Vincenzo Librandi, Jul 06 2015
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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