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A213026 Number of certain marked rooted punctured quadrangulations with n weighted edges. 0
0, 2, 6, 56, 270 (list; graph; refs; listen; history; text; internal format)
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: A084123 A193473 A181509 * A074023 A000146 A318001

Adjacent sequences:  A213023 A213024 A213025 * A213027 A213028 A213029

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 03 2012

STATUS

approved

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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)