Number of 4-regular maps on the Klein bottle with n vertices and 2n edges.
A323276
Number of 4-regular maps on the Klein bottle with n vertices and 2n edges.
Terms
- a(0) =0a(1) =4a(2) =68a(3) =964a(4) =12836a(5) =165784a(6) =2103788a(7) =26396416a(8) =328621604a(9) =4068021916a(10) =50142879128
External references
- oeis: A323276