109221651domain: NAppears in sequencesGaussian binomial coefficient [ 2n,n ] for q=2.at n=5A006098Gaussian binomial coefficient [ n, n/2 ] for q=2.at n=10A006099Gaussian binomial coefficient [n, 5] for q = 2.at n=5A006110Square array T(n, k) = q-binomial(2*n, n, k+1), read by antidiagonals.at n=26A156914