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

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =41a(5) =1a(6) =2a(7) =1201a(8) =1201a(9) =2a(10) =3a(11) =36281a(12) =559647a(13) =36281a(14) =3a(15) =5a(16) =1094401a(17) =268870883a(18) =268870883a(19) =1094401a(20) =5a(21) =8a(22) =33014921a(23) =129026029705a(25) =129026029705a(26) =33014921a(27) =8a(28) =13a(29) =995960401a(34) =995960401