92841domain: NAppears in sequencesa(n) = 4^n + 8^n + 9^n.at n=5A074570a(n) = n*(n^3-n^2+n+1)/2.at n=21A100855Number of length n+2 0..4 arrays with no three elements in a row with pattern aba (with a!=b) and new values 0..4 introduced in 0..4 order.at n=8A243601