Triangle T(n, k) = (n-k)^2 * binomial(n-1, k-1)^2 with T(n, 0) = T(n, n) = 1, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =9a(12) =36a(13) =9a(14) =1a(15) =1a(16) =16a(17) =144a(18) =144a(19) =16a(20) =1a(21) =1a(22) =25a(23) =400a(24) =900a(25) =400a(26) =25a(27) =1a(28) =1a(29) =36