68642domain: NAppears in sequencesa(n) is the number of digits in the decimal representation of the smallest Lucas number that contains n consecutive identical digits.at n=10A217192G.f.: Sum_{n>=0} (2^n + i)^n * x^n / (1 + 2^n*i*x)^(n+1), where i^2 = -1.at n=4A324308