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A006434
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Tree-rooted toroidal maps.
(Formerly M3708)
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0
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4, 120, 1230, 7424, 32424, 113584, 338742, 893220, 2136618, 4721728, 9770904
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Walsh, T. R. S.; Lehman, A. B.; Counting rooted maps by genus. III: Nonseparable maps. J. Combinatorial Theory Ser. B 18 (1975), 222-259.
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CROSSREFS
| Sequence in context: A096464 A064204 A054644 * A002702 A068204 A203033
Adjacent sequences: A006431 A006432 A006433 * A006435 A006436 A006437
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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