Array read by antidiagonals: T(n,m) is the number of matchings in the torus grid graph C_n X C_m.

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =7a(5) =4a(6) =7a(7) =32a(8) =32a(9) =7a(10) =11a(11) =108a(12) =370a(13) =108a(14) =11a(15) =18a(16) =342a(17) =2764a(18) =2764a(19) =342a(20) =18a(21) =29a(22) =1104a(23) =19874a(24) =41025a(25) =19874a(26) =1104a(27) =29a(28) =47a(29) =3544