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

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =5a(5) =3a(6) =4a(7) =9a(8) =9a(9) =4a(10) =5a(11) =14a(12) =24a(13) =14a(14) =5a(15) =6a(16) =20a(17) =58a(18) =58a(19) =20a(20) =6a(21) =7a(22) =27a(23) =125a(24) =229a(25) =125a(26) =27a(27) =7a(28) =8a(29) =35