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A085812
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Sum(sum(binomial(i,j),i=n..2*n),j=0..n).
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0
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1, 5, 22, 91, 366, 1454, 5748, 22691, 89590, 354010, 1400268, 5544334, 21973420, 87158972, 345977832, 1374249251, 5461704870, 21717305762, 86391846492, 343800647066, 1368639516420, 5450093895812, 21708897213912, 86492537630606
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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EXAMPLE
| a(1)=binomial(1,0)+binomial(2,0)+binomial(1,1)+binomial(2,1)=1+1+1+2=5
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MAPLE
| a := n->add(add(binomial(i, j), i=n..2*n), j=0..n); seq(a(n), n=0..25);
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CROSSREFS
| Sequence in context: A128566 A097138 A050185 * A172061 A053297 A071715
Adjacent sequences: A085809 A085810 A085811 * A085813 A085814 A085815
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KEYWORD
| nonn
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AUTHOR
| Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jul 25 2003
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