Triangle read by rows giving numbers H(n,k), number of classes of twin-tree-rooted maps with n edges whose root bond contains k edges.
A260040
Triangle read by rows giving numbers H(n,k), number of classes of twin-tree-rooted maps with n edges whose root bond contains k edges.
Terms
- a(0) =1a(1) =8a(2) =1a(3) =72a(4) =15a(5) =1a(6) =720a(7) =190a(8) =24a(9) =1a(10) =7780a(11) =2345a(12) =415a(13) =35a(14) =1a(15) =89040a(16) =29127a(17) =6384a(18) =798a(19) =48a(20) =1a(21) =1064644a(22) =367248a(23) =93324a(24) =15162a(25) =1400a(26) =63a(27) =1a(28) =13173216a(29) =4708344
External references
- oeis: A260040