id:A132070 - OEIS Search Results

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A132070

G.f. A(x) = SeriesReversion( x/(1 + G(x)) ) where G(x) is the g.f. of A113882 (number of well-nested drawings of a rooted tree).

+0
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1, 1, 3, 16, 121, 1166, 13508, 181616, 2769085, 47109136, 883639920, 18107148225, 402374973506, 9637795235498, 247545497301618, 6787859682565805, 197933312666622029, 6116627434424525916, 199695744998600583128 (list; graph; listen)

	OFFSET	`0,3`
	PROGRAM	`(PARI) {a(n)=local(G=1+x); for(k=0, n, G=1+xderiv(serreverse(x/(G+x^2O(x^n))))); polcoeff(serreverse(x/G)/x, n)}`
	CROSSREFS	`Cf. A113882.` `Adjacent sequences: A132067 A132068 A132069 this_sequence A132071 A132072 A132073` `Sequence in context: A136168 A120015 A003692 this_sequence A121629 A141625 A053588`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Aug 08 2007`

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Last modified October 12 15:01 EDT 2008. Contains 144830 sequences.

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