2706385domain: NAppears in sequencesa(n)= 4*a(n-1) +13*a(n-2) -44*a(n-3) -57*a(n-4) +120*a(n-5) +63*a(n-6) -56*a(n-7) +6*a(n-8).at n=8A121798Number of (n+1) X (1+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0001 0101 0111.at n=12A259508