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A026861
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T(2n,n+1), T given by A026747.
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0
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1, 5, 22, 95, 411, 1790, 7855, 34725, 154573, 692450, 3120206, 14135555, 64356345, 294341325, 1351889910, 6233399525, 28845511125, 133933280000, 623811120960, 2913924782375, 13648296620445, 64087737455725, 301644762913977
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(n+1)=p(n+1) where p(x) is the unique degree-n polynomial such that p(k)=A002212(k+1) for k=0,1,...,n. - Michael Somos, Oct 07 2003
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PROG
| (PARI) a(n)=if(n<1, 0, subst(polinterpolate(Vec((1-3*x-sqrt(1-6*x+5*x^2+x^2*O(x^n)))/2)), x, n+1))
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CROSSREFS
| Sequence in context: A141222 A127360 A116415 * A026888 A083586 A200676
Adjacent sequences: A026858 A026859 A026860 * A026862 A026863 A026864
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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