86476domain: NAppears in sequencesPowers of fifth root of 4 rounded up.at n=41A018125Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 478", based on the 5-celled von Neumann neighborhood.at n=8A272452a(n) = Sum_{d|n} mu(n/d) * binomial(d,4).at n=39A346761