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Search: id:A090352
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| 1, 2, 7, 36, 255, 2370, 27713, 393352, 6582068, 126888632, 2767912036, 67362737168, 1808596304964, 53083358012760, 1690443996202428, 58039582729688320, 2136931230333535178, 83981145793974066484
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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See comments in A090351.
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FORMULA
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G.f. satisfies: A(x)^3 = A(x/(1-x))^2/(1-x)^2.
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PROGRAM
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(PARI) {a(n)=local(A); if(n<1, 0, A=1+x+x*O(x^n); for(k=1, n, B=subst(A, x, x/(1-x))/(1-x)+x*O(x^n); A=A-A^3+B^2); polcoeff(A, n, x))}
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CROSSREFS
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Cf. A090351.
Sequence in context: A125033 A034430 A112293 this_sequence A123549 A009704 A141308
Adjacent sequences: A090349 A090350 A090351 this_sequence A090353 A090354 A090355
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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 26 2003
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