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A007143
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E-trees with exactly 2 colors.
(Formerly M3013)
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0
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0, 0, 3, 16, 65, 238, 866, 3128, 11493, 42660, 160584, 610640, 2345504, 9081768, 35422175, 139022622, 548671517, 2176051050, 8668363573, 34667284390, 139140830956, 560271494630, 2262709876003, 9163000968554, 37198940600264, 151364381618576
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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REFERENCES
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G. Gati, F. Harary and R. W. Robinson, Line colored trees with extendable automorphisms, Acta Math. Scientia, 2 (1982), 105-110.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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