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Search: id:A108292
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| 1, 3, 19, 195, 2751, 49413, 1079079, 27760323, 822299383, 27565191753, 1031671508495, 42643092165765, 1929325374428791, 94835735736471369, 5032700868665421519, 286770182910733076163, 17463186681730290301671
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OFFSET
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0,2
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FORMULA
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a(n) = Sum_{k=0..n} A108267(n, k)*2^k.
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PROGRAM
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(PARI) {a(n)=local(X=x+x*O(x^n)); sum(k=0, n, polcoeff(sum(j=0, n, binomial(n+n*j+j, n*j+j)*(x/(1+X))^j)/(1+X), k))} (PARI) {a(n)=sum(k=0, n, 2^k*polcoeff( (1-x)^(n+1)*sum(j=0, n, binomial(n+n*j+j, n*j+j)*x^j), k))}
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CROSSREFS
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Cf. A108267, A060543, A108290.
Adjacent sequences: A108289 A108290 A108291 this_sequence A108293 A108294 A108295
Sequence in context: A001517 A080893 A028854 this_sequence A048172 A053554 A079145
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), May 31 2005
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