77598domain: NAppears in sequencesNumber of (3+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=28A250758Expansion of Sum_{k>=0} x^k / Product_{j=1..k} (1 + j*x^j).at n=33A306702