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A110166
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Row sums of Riordan array A110165.
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1
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1, 4, 18, 85, 410, 1999, 9807, 48304, 238570, 1180615, 5851253, 29033074, 144190943, 716652070, 3564079250, 17734184365, 88280673770, 439625873215, 2189988826125, 10912480440850, 54389237971285, 271142650382080
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f.: (1/sqrt(1-6x+5x^2)/(1-(1-3x-sqrt(1-6x+5x^2)))/(2x)); a(n)=sum{k=0..n, sum{j=0..n, C(n, j)C(2j, j+k)}}.
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MATHEMATICA
| Table[Sum[Sum[Binomial[n, j]Binomial[2j, j+k], {j, 0, n}], {k, 0, n}], {n, 0, 25}] (* From Harvey P. Dale, Dec 16 2011 *)
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CROSSREFS
| Sequence in context: A007859 A185132 A085923 * A046885 A055834 A079567
Adjacent sequences: A110163 A110164 A110165 * A110167 A110168 A110169
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KEYWORD
| easy,nonn
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Jul 14 2005
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