Square array read by upwards antidiagonals: T(m,n) is the number of simple 3-connected triangulations of a closed region in the plane with m+3 given external edges and 3n+m internal edges, m>=0, n>=1.
A210664
Square array read by upwards antidiagonals: T(m,n) is the number of simple 3-connected triangulations of a closed region in the plane with m+3 given external edges and 3n+m internal edges, m>=0, n>=1.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =1a(6) =1a(7) =5a(8) =6a(9) =3a(10) =1a(11) =9a(12) =20a(13) =22a(14) =12a(15) =1a(16) =14a(17) =50a(18) =85a(19) =91a(20) =52a(21) =1a(22) =20a(23) =105a(24) =254a(25) =385a(26) =408a(27) =241a(28) =1a(29) =27
External references
- oeis: A210664