2000000001domain: NAppears in sequencesa(1) = 1 and a(n+1) is the least number > a(n) that begins with the last digit of a(n) and doesn't end with 0.at n=27A098752a(n) = 2*10^n + 1.at n=9A199682List of ternary words obtained by expanding (2+x)^n mod 3 and reading the coefficients starting with the constant term.at n=9A255285