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Search: id:A090360
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| 1, 1, 5, 53, 855, 18471, 500651, 16334075, 623157898, 27214793210, 1338641476882, 73220527990322, 4408033139790830, 289619155572769806, 20620846574162157750, 1581511116725744872022, 129981009079318502310677
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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See comments in A090358.
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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^5, x, x/(1-x))/(1-x)+x*O(x^n); A=A-A^6+B); B=subst(A^2, x, x/(1-x))/(1-x)+x*O(x^n); polcoeff(B^(1/3), n, x))}
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CROSSREFS
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Cf. A090358.
Sequence in context: A036910 A036916 A118583 this_sequence A123130 A094089 A128943
Adjacent sequences: A090357 A090358 A090359 this_sequence A090361 A090362 A090363
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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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