A213026 Number of certain marked rooted punctured quadrangulations with n weighted edges.

0, 2, 6, 56, 270

Offset

0,2

Comments

See reference for precise definition.

References

Liskovets, Valery A. A reductive technique for enumerating non-isomorphic planar maps. Discrete Math. 156 (1996), no. 1-3, 197--217. MR1405018 (97f:05087) (See Q'_1(n).)

Links

Table of n, a(n) for n=0..4.

Crossrefs

Sequence in context: A193473 A336899 A181509 * A074023 A354315 A000146

Adjacent sequences: A213023 A213024 A213025 * A213027 A213028 A213029

Keyword

nonn

Author

N. J. A. Sloane, Jun 03 2012

Status

approved