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A052315
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M-type rooted trees on n nodes.
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1
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1, 4, 17, 83, 432, 2416, 14093, 85188, 528234, 3343420, 21508182, 140225532, 924444270, 6152191399, 41275242100, 278865583963, 1895686831203, 12956648332412, 88984197144487, 613773294727307, 4250024962493357
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OFFSET
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1,2
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REFERENCES
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F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and Tree-Like Structures, Cambridge, 1998, p. 210 (3.2.68)
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LINKS
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FORMULA
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Satisfies 2*a(n) = PSum(SHIFT_RIGHT(a) + EULER(a)) - c0. c0(0)=1. c0(k)=0 if k != 0.
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CROSSREFS
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KEYWORD
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nonn,eigen
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AUTHOR
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STATUS
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approved
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