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A091138 E.g.f. A(x) satisfies A(A(x)) = x/(1-x)^2. +0
3
1, 2, 3, 6, 15, 0, 315, 1890, -82215, 708750, 41008275, -1385549550, -33403344975, 3426898600125, 26529571443375, -13516476003780750, 157765729690193625, 84230651703487038750, -3280917943856839411125, -799561865724400084556250, 62859004972802312944044375 (list; graph; listen)
OFFSET

1,2

COMMENT

First non-integer term is a(30) = 16103946844555056574100466078211185438823359375/2.

LINKS

R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 28 2007, Table of n, a(n) for n = 1..28

FORMULA

a(n) = n!* A030274(n)/A030275(n).

CROSSREFS

Sequence in context: A091285 A109459 A118986 this_sequence A090983 A066653 A081945

Adjacent sequences: A091135 A091136 A091137 this_sequence A091139 A091140 A091141

KEYWORD

easy,frac,fini,sign

AUTHOR

Vladeta Jovovic (vladeta(AT)Eunet.yu), Dec 20 2003

EXTENSIONS

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 28 2007

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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