30923764531domain: NAppears in sequencesDecimal representation of n-th iteration of the Rule 158 elementary cellular automaton starting with a single black cell.at n=17A118171a(n) = a(n-1) + 16*a(n-3) - 16*a(n-4), where a(0) = 1, a(1) = 4, a(2) = 7, a(3) = 19.at n=26A297556