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Search: id:A099045
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A099045 (3*0^n+4^n*binomial(2n,n))/4. +0
3
1, 2, 24, 320, 4480, 64512, 946176, 14057472, 210862080, 3186360320, 48432676864, 739699064832, 11342052327424, 174493112729600, 2692179453542400, 41639042214789120, 645405154329231360, 10022762396642181120 (list; graph; listen)
OFFSET

0,2

COMMENT

(1+(k-1)sqrt(1-4kx))/(k*sqrt(1-4kx)) is the g.f. for ((k-1)0^n+k^n*C(2n,n))/k.

FORMULA

G.f.: (1+3sqrt(1-16x))/(4sqrt(1-16x))

CROSSREFS

Cf. A069723, A088218, A099044, A099046.

Sequence in context: A065513 A119491 A001864 this_sequence A013523 A081065 A043699

Adjacent sequences: A099042 A099043 A099044 this_sequence A099046 A099047 A099048

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Sep 24 2004

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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