Number of unsensed planar maps with n edges and without loops or isthmuses.
A006399
Number of unsensed planar maps with n edges and without loops or isthmuses.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =4a(5) =8a(6) =27a(7) =76a(8) =295a(9) =1188a(10) =5462a(11) =26580a(12) =138110
External references
- oeis: A006399