Number of unrooted two-face maps in the plane (considered up to orientation-preserving homeomorphism) with the faces of equal degree n: planar maps with a distinguished outside face.
A113183
Number of unrooted two-face maps in the plane (considered up to orientation-preserving homeomorphism) with the faces of equal degree n: planar maps with a distinguished outside face.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =18a(6) =58a(7) =155a(8) =546a(9) =1592a(10) =5774a(11) =17798a(12) =65676a(13) =210362a(14) =785248a(15) =2588155a(16) =9743348a(17) =32832290a(18) =124416022a(19) =426685544a(20) =1625465732a(21) =5654938190a(22) =21636274202a(23) =76171463926a(24) =292498386900
External references
- oeis: A113183