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A162633
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E.g.f. satisfies: A(x) = exp( x*A(x+x^2) ).
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1
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1, 1, 3, 22, 245, 4056, 89887, 2564794, 91107417, 3927302920, 201515838011, 12117018752334, 842801806725397, 67076226899414500, 6051672367977392535, 613945094407473751906, 69541717694720436605873
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OFFSET
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0,3
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LINKS
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EXAMPLE
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E.g.f.: A(x) = 1 + x + 3*x^2/2! + 22*x^3/3! + 245*x^4/4! + 4056*x^5/5! +...
A(x+x^2) = 1 + x + 5*x^2/2! + 40*x^3/3! + 545*x^4/4! + 10276*x^5/5! +...
where log(A(x)) = x*A(x+x^2).
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PROG
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(PARI) {a(n)=local(A=1+x); for(i=1, n, A=exp(x*subst(A, x, x+x^2+x*O(x^n)))); n!*polcoeff(A, n)}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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