Number of unrooted n-edge isthmusless maps in the plane (planar with a distinguished outside face).
A103942
Number of unrooted n-edge isthmusless maps in the plane (planar with a distinguished outside face).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =38a(5) =187a(6) =1120a(7) =7083a(8) =47990a(9) =337676a(10) =2455517a(11) =18310155a(12) =139447034a(13) =1080773098a(14) =8502896424a(15) =67763884363a(16) =546147639926
External references
- oeis: A103942