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A006426 Number of rooted toroidal maps.
(Formerly M4751)
0
10, 340, 5846, 71372, 706068, 6052840, 46759630, 333746556, 2238411692 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

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.

CROSSREFS

Sequence in context: A127823 A113082 A046747 * A029698 A197598 A197982

Adjacent sequences:  A006423 A006424 A006425 * A006427 A006428 A006429

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 15 14:57 EST 2012. Contains 205823 sequences.