11324105960domain: NAppears in sequencesNumber of (n+1) X (1+1) 0..3 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=13A250870Number of achiral color patterns (set partitions) for a row or loop of length n using exactly 4 colors (sets).at n=35A304974