Number of unsensed 4-regular maps with 2*n edges on the projective plane.
A348764
Number of unsensed 4-regular maps with 2*n edges on the projective plane.
Terms
- a(0) =2a(1) =6a(2) =29a(3) =153a(4) =1015a(5) =7572a(6) =62316a(7) =548575a(8) =5069705a(9) =48490576a(10) =475784885a(11) =4760060954a(12) =48363620851a(13) =497636022164
External references
- oeis: A348764