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Search: id:A090357
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| 1, 4, 26, 244, 3131, 52600, 1111940, 28559320, 865622825, 30250881420, 1196941704454, 52860066623036, 2576115583371739, 137274420821505776, 7937914900025008984, 494941882189888642832, 33096552232229291234923
(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 A090356.
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FORMULA
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G.f.: A(x)^5 = A(x/(1-x))^4/(1-x)^4.
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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^5+B^4); polcoeff(A, n, x))}
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CROSSREFS
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Cf. A090356.
Sequence in context: A115416 A052577 A052880 this_sequence A056786 A006056 A098620
Adjacent sequences: A090354 A090355 A090356 this_sequence A090358 A090359 A090360
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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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