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A055861 Essentially A053506 but with leading 0 (instead of 1) and offset 0. 2
0, 0, 6, 48, 500, 6480, 100842, 1835008, 38263752, 900000000, 23579476910, 681091006464, 21505924728444, 737020860878848, 27246730957031250, 1080863910568919040, 45798768824157052688, 2064472028642102280192 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

FORMULA

a(0)= 0 =a(1); a(n)= n*(n+1)^(n-1), n >= 2.

E.g.f.: -x+ W(-x)^2/((1+W(-x))*x) = diff(W(-x)^2, x)/2-x, W(x) principal branch of Lambert's function.

CROSSREFS

Third column of triangle A055858. Cf. A053506, A000312, A000169, A055860.

Sequence in context: A051578 A052639 A053506 * A052567 A002170 A153467

Adjacent sequences:  A055858 A055859 A055860 * A055862 A055863 A055864

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jun 20 2000

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Last modified February 14 00:21 EST 2012. Contains 205567 sequences.