Number of unrooted regular planar maps of valency 7 with 2n vertices (considered up to orientation-preserving homeomorphisms).
A112950
Number of unrooted regular planar maps of valency 7 with 2n vertices (considered up to orientation-preserving homeomorphisms).
Terms
- a(0) =39a(1) =80600a(2) =513654400
External references
- oeis: A112950