Triangle read by rows: T(n,k) = 4^k*binomial(n+k, n-k) with 0 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =4a(3) =1a(4) =12a(5) =16a(6) =1a(7) =24a(8) =80a(9) =64a(10) =1a(11) =40a(12) =240a(13) =448a(14) =256a(15) =1a(16) =60a(17) =560a(18) =1792a(19) =2304a(20) =1024a(21) =1a(22) =84a(23) =1120a(24) =5376a(25) =11520a(26) =11264a(27) =4096a(28) =1a(29) =112