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

Terms

a(0) =2a(1) =3a(2) =3a(3) =5a(4) =5a(5) =5a(6) =9a(7) =11a(8) =11a(9) =9a(10) =15a(11) =25a(12) =43a(13) =25a(14) =15a(15) =26a(16) =51a(17) =133a(18) =133a(19) =51a(20) =26a(21) =44a(22) =113a(23) =463a(24) =647a(25) =463a(26) =113a(27) =44a(28) =76a(29) =235