369032domain: NAppears in sequencesConstant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=9A192744Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.at n=8A196432