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Search: id:A026861
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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
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OFFSET
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1,2
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COMMENT
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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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PROGRAM
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(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
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Sequence in context: A141222 A127360 A116415 this_sequence A026888 A083586 A129158
Adjacent sequences: A026858 A026859 A026860 this_sequence A026862 A026863 A026864
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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