Number of n-node connected unsensed planar maps with an external face in which all internal faces are triangles.
A377785
Number of n-node connected unsensed planar maps with an external face in which all internal faces are triangles.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =19a(4) =80a(5) =407a(6) =2403a(7) =15570a(8) =107366a(9) =773660a(10) =5746826a(11) =43693041a(12) =338367370a(13) =2660629311a(14) =21193182914a(15) =170714892489
External references
- oeis: A377785