Array read by antidiagonals: A(n,k) is the number of achiral planar maps with n vertices and k faces, n >= 1, k >= 1.
A379431
Array read by antidiagonals: A(n,k) is the number of achiral planar maps with n vertices and k faces, n >= 1, k >= 1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =2a(7) =5a(8) =5a(9) =2a(10) =3a(11) =12a(12) =17a(13) =12a(14) =3a(15) =6a(16) =28a(17) =58a(18) =58a(19) =28a(20) =6a(21) =10a(22) =68a(23) =179a(24) =247a(25) =179a(26) =68a(27) =10a(28) =20a(29) =157
External references
- oeis: A379431