2333333333domain: NAppears in sequencesa(n) = A133195(n)/3.at n=29A133201a(0)=2, a(1)=3. Then 2 or 22 followed by a string of 3's such that the sum of the digits of a(n) is equal to prime(n).at n=9A157733a(n) = (7*10^n - 1)/3.at n=9A198972