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Search: id:A113662
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| 1, 2, 9, 62, 566, 6372, 84837, 1300214, 22511322, 434226300, 9231983850, 214481625516, 5406323440492, 146963638311880, 4286068830850797, 133501081493969574, 4423404073559930162, 155359770700317171084
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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)] )^2.
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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))^2); polcoeff(A, n, x)}
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CROSSREFS
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Cf. A000699, A113663, A113664, A113665, A113666, A113667, A113668.
Sequence in context: A006155 A121870 A146887 this_sequence A052820 A100262 A003577
Adjacent sequences: A113659 A113660 A113661 this_sequence A113663 A113664 A113665
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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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