Array read by antidiagonals: T(n,m) is the number of (undirected) cycles in the rook graph K_n X K_m.
A286418
Array read by antidiagonals: T(n,m) is the number of (undirected) 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) =7a(7) =14a(8) =14a(9) =7a(10) =37a(11) =170a(12) =312a(13) =170a(14) =37a(15) =197a(16) =2904a(17) =13945a(18) =13945a(19) =2904a(20) =197a(21) =1172a(22) =74779a(23) =1241696a(24) =3228524a(25) =1241696a(26) =74779a(27) =1172a(28) =8018a(29) =2751790
External references
- oeis: A286418