Square array read by ascending antidiagonals: T(n,k) = [x^(n*k)] ((1 + x)/(1 - x))^k for n, k >= 1.

Terms

a(0) =2a(1) =2a(2) =8a(3) =2a(4) =16a(5) =38a(6) =2a(7) =24a(8) =146a(9) =192a(10) =2a(11) =32a(12) =326a(13) =1408a(14) =1002a(15) =2a(16) =40a(17) =578a(18) =4672a(19) =14002a(20) =5336a(21) =2a(22) =48a(23) =902a(24) =11008a(25) =69002a(26) =142000a(27) =28814a(28) =2a(29) =56