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Search: id:A126266
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| 1, 2, 3, 28, 245, 1626, 15127, 190968, 2389977, 30873790, 448821131, 7114224756, 118167143965, 2069398819502, 38512533444855, 755518153347376, 15502607812688529, 332330062063140054, 7436822666078492083
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OFFSET
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0,2
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COMMENT
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a(n) is divisible by (n+1). Rows of triangle A126265 lists coefficients of q in e.g.f. that satisfies: W(x,q) = exp( q*x*W(q*x,q) ).
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PROGRAM
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(PARI) {a(n)=local(W=x); for(i=1, n+1, W=x*exp(subst(W, x, q*x+x*O(x^(n+1))))); if(n<0, 0, Vec(Vec(W)[n+2]*(n+1)!+q*O(q^((n+1)*(n+2)/2)))[n+1])}
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CROSSREFS
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Cf. A126265, A126267.
Sequence in context: A012697 A001094 A052848 this_sequence A003017 A096580 A028868
Adjacent sequences: A126263 A126264 A126265 this_sequence A126267 A126268 A126269
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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), Dec 22 2006
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