Triangle read by rows: T(n,k) is the number of rooted loopless planar maps with n edges, k faces and no isthmuses, n >= 0, k = 1..n+1.
A342980
Triangle read by rows: T(n,k) is the number of rooted loopless planar maps with n edges, k faces and no isthmuses, n >= 0, k = 1..n+1.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =1a(9) =0a(10) =0a(11) =1a(12) =8a(13) =1a(14) =0a(15) =0a(16) =1a(17) =20a(18) =20a(19) =1a(20) =0a(21) =0a(22) =1a(23) =38a(24) =131a(25) =38a(26) =1a(27) =0a(28) =0a(29) =1
External references
- oeis: A342980