Number of rooted 2-connected loopless 4-regular maps on the projective plane with n inner faces.
A318103
Number of rooted 2-connected loopless 4-regular maps on the projective plane with n inner faces.
Terms
- a(0) =6a(1) =21a(2) =138a(3) =781a(4) =4836a(5) =30099a(6) =191698a(7) =1236024a(8) =8063492a(9) =53086930a(10) =352249244a(11) =2352800079a(12) =15805224904a(13) =106702428453a(14) =723509453442
External references
- oeis: A318103