Array read by antidiagonals: T(n,m) is the number of Hamiltonian cycles in the rook graph K_n X K_m.

A269562

Array read by antidiagonals: T(n,m) is the number of Hamiltonian cycles in the rook graph K_n X K_m.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =3a(7) =3a(8) =3a(9) =3a(10) =12a(11) =30a(12) =48a(13) =30a(14) =12a(15) =60a(16) =480a(17) =1566a(18) =1566a(19) =480a(20) =60a(21) =360a(22) =12000a(23) =126120a(24) =284112a(25) =126120a(26) =12000a(27) =360a(28) =2520a(29) =430920

External references