37904domain: NAppears in sequencesNumber of (n+2) X (2+2) 0..1 arrays with every 2 X 2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=22A253504Expansion of (1+x-x^2+x^3) / (1-x-5*x^2+x^3+2*x^4).at n=11A384642