Square array read by antidiagonals: T(m,n) = Sum_{k=1..m-1} T(m-k,n) + Sum_{k=1..n-1} T(m,n-k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =4a(7) =5a(8) =5a(9) =4a(10) =8a(11) =12a(12) =14a(13) =12a(14) =8a(15) =16a(16) =28a(17) =37a(18) =37a(19) =28a(20) =16a(21) =32a(22) =64a(23) =94a(24) =106a(25) =94a(26) =64a(27) =32a(28) =64a(29) =144