-14706domain: ZAppears in sequencesa(n) = (1 - (-7)^n)/8.at n=5A014989Triangle of q-binomial coefficients for q=-7.at n=22A015117Triangle of q-binomial coefficients for q=-7.at n=26A015117Gaussian binomial coefficient [ n,5 ] for q = -7.at n=1A015312