320200domain: NAppears in sequencesExpansion of x/((1-x-x^3)*(1-x)^6).at n=18A144900Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000011.at n=8A259888