Triangle read by rows: T(n,k) is the number of unsensed combinatorial maps with n edges and genus k, 0 <= k <= floor(n/2).
A379439
Triangle read by rows: T(n,k) is the number of unsensed combinatorial maps with n edges and genus k, 0 <= k <= floor(n/2).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =1a(4) =14a(5) =6a(6) =52a(7) =40a(8) =4a(9) =248a(10) =320a(11) =76a(12) =1416a(13) =2946a(14) =1395a(15) =82a(16) =9172a(17) =29364a(18) =24950a(19) =4348a(20) =66366a(21) =309558a(22) =427336a(23) =160050a(24) =7258a(25) =518868a(26) =3365108a(27) =6987100a(28) =4696504a(29) =688976
External references
- oeis: A379439