Array read by antidiagonals: T(m,n) = number of irredundant sets in the grid graph P_m X P_n.

Terms

a(0) =2a(1) =3a(2) =3a(3) =5a(4) =11a(5) =5a(6) =9a(7) =26a(8) =26a(9) =9a(10) =15a(11) =79a(12) =113a(13) =79a(14) =15a(15) =26a(16) =224a(17) =548a(18) =548a(19) =224a(20) =26a(21) =44a(22) =640a(23) =2513a(24) =4481a(25) =2513a(26) =640a(27) =44a(28) =76a(29) =1828