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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =9a(8) =126a(9) =1a(10) =1a(11) =16a(12) =1820a(13) =11440a(14) =1a(15) =1a(16) =25a(17) =12650a(18) =2042975a(19) =2042975a(20) =1a(21) =1a(22) =36a(23) =58905a(24) =94143280a(25) =7307872110a(26) =600805296a(27) =1a(28) =1a(29) =49