Table read by rows: T(n, k) is the number of permutations of size n whose incidence graph has treewidth k.

A368500

Table read by rows: T(n, k) is the number of permutations of size n whose incidence graph has treewidth k.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =0a(4) =2a(5) =4a(6) =0a(7) =2a(8) =20a(9) =2a(10) =0a(11) =2a(12) =76a(13) =42a(14) =0a(15) =2a(16) =252a(17) =466a(18) =0a(19) =2a(20) =788a(21) =4110a(22) =140a(23) =0a(24) =2a(25) =2374a(26) =32388a(27) =5556a(28) =0a(29) =2

External references