Triangle read by rows: T(n,m) = (binomial(n - 1, m - 1)*binomial(n, m - 1)/m)^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =1a(6) =1a(7) =36a(8) =36a(9) =1a(10) =1a(11) =100a(12) =400a(13) =100a(14) =1a(15) =1a(16) =225a(17) =2500a(18) =2500a(19) =225a(20) =1a(21) =1a(22) =441a(23) =11025a(24) =30625a(25) =11025a(26) =441a(27) =1a(28) =1a(29) =784