A347951 a(n) = number of maximal chord diagrams by genus d^(||)_2n.

1, 5, 41, 509, 8229, 166377, 4016613, 113044185, 3630535785, 131095612845, 5256401729985, 231748716159765, 11142710564597325, 580259659715478225, 32535080119520689725

Offset

1,2

Comments

Also, number of rooted maps with one face, one vertex and n edges on both orientable and non-orientable surfaces.

Links

Table of n, a(n) for n=1..15.

Evgeniy Krasko, Counting Unlabelled Chord Diagrams of Maximal Genus, arXiv:1709.00796 [math.CO], 2017. See Appendix Table 1.

M. Ledoux, A recursion formula for the moments of the Gaussian orthogonal ensemble, Annales de l’Institut Henri Poincaré - Probabilités et Statistiques, 2009, Vol. 45, No. 3, 754-769.

Formula

Ledoux's article gives a five-term recurrence for related polynomials.

Crossrefs

Cf. A291172, A291371, A292111, A035319.

Sequence in context: A056545 A362111 A325888 * A275787 A009755 A000685

Adjacent sequences: A347948 A347949 A347950 * A347952 A347953 A347954

Keyword

nonn,more

Author

Michael De Vlieger, Nov 02 2021

Status

approved