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A002007 Almost trivalent maps.
(Formerly M4987 N2144)
0
15, 200, 2672, 37600, 554880, 8514560, 134864640 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

REFERENCES

R. C. Mullin, E. Nemeth and P. J. Schellenberg, The enumeration of almost cubic maps, pp. 281-295 in Proceedings of the Louisiana Conference on Combinatorics, Graph Theory and Computer Science. Vol. 1, edited R. C. Mullin et al., 1970.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

CROSSREFS

Sequence in context: A078264 A014896 A048444 * A178507 A012566 A070968

Adjacent sequences:  A002004 A002005 A002006 * A002008 A002009 A002010

KEYWORD

nonn

AUTHOR

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

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Last modified February 14 18:47 EST 2012. Contains 205663 sequences.