Triangle defined by T(n,k) = binomial(n^2, n*k), for n>=0, k=0..n, as read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =84a(8) =84a(9) =1a(10) =1a(11) =1820a(12) =12870a(13) =1820a(14) =1a(15) =1a(16) =53130a(17) =3268760a(18) =3268760a(19) =53130a(20) =1a(21) =1a(22) =1947792a(23) =1251677700a(24) =9075135300a(25) =1251677700a(26) =1947792a(27) =1a(28) =1a(29) =85900584