200525284806domain: NAppears in sequencesGaussian binomial coefficient [ n,4 ] for q = 5.at n=4A006113Gaussian binomial coefficient [ 2n,n ] for q=5.at n=4A006114Gaussian binomial coefficient [ n,n/2 ] for q=5.at n=8A006115Square array T(n, k) = q-binomial(2*n, n, k+1), read by antidiagonals.at n=40A156914