A002008 Almost trivalent maps. (Formerly M4027 N1671)

5, 120, 1840, 27552, 421248, 6613504, 106441472, 1750927872

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..7.

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

Crossrefs

Cf. A002006, A002007, A002009, A002010.

Sequence in context: A155202 A168599 A193328 * A307350 A322707 A160695

Adjacent sequences: A002005 A002006 A002007 * A002009 A002010 A002011

Keyword

nonn,more

Author

N. J. A. Sloane

Status

approved