Triangle read by rows: T(n,k) is the number of nonseparable tree-rooted planar maps with n edges and k faces, n >= 0, k = 1..n+1.

A342984

Triangle read by rows: T(n,k) is the number of nonseparable tree-rooted planar maps with n edges and k faces, n >= 0, k = 1..n+1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =0a(6) =0a(7) =3a(8) =3a(9) =0a(10) =0a(11) =4a(12) =20a(13) =4a(14) =0a(15) =0a(16) =5a(17) =75a(18) =75a(19) =5a(20) =0a(21) =0a(22) =6a(23) =210a(24) =604a(25) =210a(26) =6a(27) =0a(28) =0a(29) =7

External references