139402domain: NAppears in sequencesNumber of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=9A253837E.g.f. C(x) = C(x,x), where C(x,y) is the e.g.f. of triangle A326799.at n=4A326796