Triangle read by rows: T(n,k) is the number of permutation graphs on n vertices with domination number k, with 1 <= k <= n.

A320578

Triangle read by rows: T(n,k) is the number of permutation graphs on n vertices with domination number k, with 1 <= k <= n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =10a(7) =10a(8) =3a(9) =1a(10) =43a(11) =54a(12) =18a(13) =4a(14) =1a(15) =223a(16) =351a(17) =113a(18) =27a(19) =5a(20) =1a(21) =1364a(22) =2613a(23) =833a(24) =186a(25) =37a(26) =6a(27) =1a(28) =9643a(29) =21965

External references