Triangle T(n,k) = 4*binomial(n,k)^2 - 3, read by rows, 0<=k<=n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =13a(5) =1a(6) =1a(7) =33a(8) =33a(9) =1a(10) =1a(11) =61a(12) =141a(13) =61a(14) =1a(15) =1a(16) =97a(17) =397a(18) =397a(19) =97a(20) =1a(21) =1a(22) =141a(23) =897a(24) =1597a(25) =897a(26) =141a(27) =1a(28) =1a(29) =193