Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.

A360194

Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =15a(5) =4a(6) =8a(7) =112a(8) =112a(9) =8a(10) =16a(11) =836a(12) =3102a(13) =836a(14) =16a(15) =32a(16) =6240a(17) =85818a(18) =85818a(19) =6240a(20) =32a(21) =64a(22) =46576a(23) =2373870a(24) =8790016a(25) =2373870a(26) =46576a(27) =64a(28) =128a(29) =347648

External references