200149domain: NAppears in sequencesNumber of base 17 n-digit numbers with adjacent digits differing by two or less.at n=7A126404G.f. A(x) satisfies: A(x) = (1/(1 - x)) * A(x^2)*A(x^3)*A(x^5)* ... *A(x^prime(k))* ...at n=44A308271