39226915domain: NAppears in sequencesTriangle of q-binomial coefficients for q=-9.at n=23A015121Triangle of q-binomial coefficients for q=-9.at n=25A015121Gaussian binomial coefficient [ n,2 ] for q = -9.at n=4A015260Gaussian binomial coefficient [ n,4 ] for q = -9.at n=2A015295