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Search: id:A113664
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| 1, 4, 38, 556, 10745, 254700, 7100444, 226687964, 8138624340, 324257974800, 14191562670382, 676772204063828, 34931592000218062, 1940427169943222088, 115440543670528170360, 7323969420842077029820, 493653199877341017573868
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OFFSET
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0,2
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FORMULA
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G.f. satisfies: A(x) = (1 + x*d/dx[x*A(x)] )^4.
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PROGRAM
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(PARI) {a(n)=local(A=1+x*O(x^n)); for(i=1, n, A=(1+x*deriv(x*A))^4); polcoeff(A, n, x)}
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CROSSREFS
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Cf. A113670, A113662, A113663, A113665, A113666, A113667, A113668.
Sequence in context: A020865 A155859 A120974 this_sequence A077745 A138214 A138562
Adjacent sequences: A113661 A113662 A113663 this_sequence A113665 A113666 A113667
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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), Nov 04 2005
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