OFFSET
2,1
COMMENTS
For 'intersection numbers' see Section 1 in Itzykson and Zuber paper.
LINKS
Gheorghe Coserea, Table of n, a(n) for n = 2..101
Stavros Garoufalidis, Marcos Marino, Universality and asymptotics of graph counting problems in nonorientable surfaces, arXiv:0812.1195 [math.CO], 2008.
C. Itzykson, J.-B. Zuber, Combinatorics of the Modular Group II: the Kontsevich integrals, arXiv:hep-th/9201001, 1991.
EXAMPLE
7/240, 1225/144, 1816871/48, 7723802625/8, 8591613499103635/96, ...
PROG
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Gheorghe Coserea, Nov 13 2016
STATUS
approved