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Search: id:A038033
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| 6, 24, 180, 1320, 11130, 103824, 1067976, 12014640, 146845710, 1938363240, 27489515196, 416924313624, 6734931220290, 115455963776160, 2093601476474640, 40040128237577184, 805513168073611926
(list; graph; listen)
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OFFSET
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3,1
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FORMULA
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E.g.f.: x^3/((1-x)^2*e^x)
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MAPLE
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a:=n->sum(n!*sum((-1)^k/k!, j=0..n), k=0..n): seq(a(n)*n, n=2..17); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 18 2007
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CROSSREFS
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Equals 6 * A000313(n+1).
Cf. A000240
Sequence in context: A126267 A026947 A122829 this_sequence A064049 A018981 A052594
Adjacent sequences: A038030 A038031 A038032 this_sequence A038034 A038035 A038036
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KEYWORD
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nonn,easy
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AUTHOR
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Christian G. Bower (bowerc(AT)usa.net) from a sequence by Erich Friedman (erich.friedman(AT)stetson.edu)
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