a(n) is the number of rooted 6-regular maps with n vertices on the projective plane.
A322930
a(n) is the number of rooted 6-regular maps with n vertices on the projective plane.
Terms
- a(0) =22a(1) =864a(2) =40512a(3) =2075860a(4) =112225776a(5) =6289396632a(6) =361699896960
External references
- oeis: A322930