Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected planar graphs with n nodes and k faces up to orientation preserving isomorphisms, n >= 3, k=2..2*n-4.
A342059
Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected planar graphs with n nodes and k faces up to orientation preserving isomorphisms, n >= 3, k=2..2*n-4.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =5a(7) =2a(8) =1a(9) =1a(10) =3a(11) =17a(12) =31a(13) =22a(14) =6a(15) =2a(16) =1a(17) =4a(18) =42a(19) =157a(20) =318a(21) =265a(22) =123a(23) =26a(24) =6a(25) =1a(26) =6a(27) =87a(28) =576a(29) =2128
External references
- oeis: A342059