-65104domain: ZAppears in sequencesa(n) = (1 - (-5)^n)/6.at n=7A014986Triangle of q-binomial coefficients for q=-5.at n=37A015113Gaussian binomial coefficient [ n,7 ] for q = -5.at n=1A015344Expansion of Product_{k>=1} 1/(1 + x^k)^(k*(2*k-1)).at n=18A295121