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

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =8a(5) =3a(6) =6a(7) =25a(8) =25a(9) =6a(10) =10a(11) =58a(12) =94a(13) =58a(14) =10a(15) =15a(16) =117a(17) =270a(18) =270a(19) =117a(20) =15a(21) =21a(22) =218a(23) =681a(24) =1004a(25) =681a(26) =218a(27) =21a(28) =28a(29) =387