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A221100 E.g.f. satisfies: A(x) = 1 + x*Sum_{n>=0} log(A(n*x))^n / n!. 1
1, 1, 2, 15, 248, 8440, 513144, 52356122, 8677146176, 2287135119744, 948641529992880, 614727594325073592, 618434779929242165856, 960690586903797786948288, 2293100087767812293312717088, 8373182505242530234213019810880, 46591358758492418174191908438641664 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..16.

EXAMPLE

E.g.f.: A(x) = 1 + x + 2*x^2/2! + 15*x^3/3! + 248*x^4/4! + 8440*x^5/5! +...

where

A(x) = 1 + x + x*log(A(x)) + x*log(A(2*x))^2/2! + x*log(A(3*x))^3/3! + x*log(A(4*x))^4/4! + x*log(A(5*x))^5/5! +...

PROG

(PARI) {a(n)=local(A=1+x); for(i=1, n, A=1+x*sum(m=0, n, log( subst(A, x, m*x+x*O(x^n)) )^m/m!)); n!*polcoeff(A, n)}

for(n=0, 20, print1(a(n), ", "))

CROSSREFS

Cf. A221101.

Sequence in context: A180610 A156750 A292798 * A203310 A102555 A264907

Adjacent sequences:  A221097 A221098 A221099 * A221101 A221102 A221103

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jan 01 2013

STATUS

approved

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Last modified June 7 02:48 EDT 2020. Contains 334836 sequences. (Running on oeis4.)