-90909domain: ZAppears in sequencesa(n) = (1 - (-10)^n)/11.at n=5A014992Triangle of q-binomial coefficients for q=-10.at n=22A015123Triangle of q-binomial coefficients for q=-10.at n=26A015123Gaussian binomial coefficient [ n,5 ] for q = -10.at n=1A015316