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A052788
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A simple grammar.
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0
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0, 1, 5, 40, 360, 3570, 37476, 410490, 4635330, 53589045, 631115140, 7544876956, 91321148575, 1116879203135, 13781214640630, 171350293212360, 2144719821588471, 27001925967762160, 341717698703959875
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Number of rooted trees with 5-colored non-root nodes. (Christian G. Bower (bowerc(AT)usa.net), Sep 07 2002)
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LINKS
| INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 745
Index entries for sequences related to rooted trees
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MAPLE
| spec := [S, {B=Set(S), S=Prod(Z, B, B, B, B, B)}, unlabeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
| Sequence in context: A007036 A052798 A137973 * A130564 A124555 A152601
Adjacent sequences: A052785 A052786 A052787 * A052789 A052790 A052791
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KEYWORD
| easy,nonn,eigen
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AUTHOR
| encyclopedia(AT)pommard.inria.fr, Jan 25 2000
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