Triangle T(n,k) = 3*binomial(n, k)^2 - binomial(n, k) - 1, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =1a(6) =1a(7) =23a(8) =23a(9) =1a(10) =1a(11) =43a(12) =101a(13) =43a(14) =1a(15) =1a(16) =69a(17) =289a(18) =289a(19) =69a(20) =1a(21) =1a(22) =101a(23) =659a(24) =1179a(25) =659a(26) =101a(27) =1a(28) =1a(29) =139