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A002009 Almost trivalent maps.
(Formerly M5314 N2308)
4
56, 1120, 18592, 300288, 4877824, 80349696, 1344154112 (list; graph; refs; listen; history; text; 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).

LINKS

Table of n, a(n) for n=0..6.

Jian Zhou, Fat and Thin Emergent Geometries of Hermitian One-Matrix Models, arXiv:1810.03883 [math-ph], 2018.

CROSSREFS

Cf. A002006, A002007, A002008, A002010.

Sequence in context: A114059 A221802 A219583 * A140901 A160346 A219371

Adjacent sequences:  A002006 A002007 A002008 * A002010 A002011 A002012

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 20 09:35 EDT 2019. Contains 321345 sequences. (Running on oeis4.)