147602domain: NAppears in sequencesNumber of (n+1) X (2+1) 0..1 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=12A250605Number of unlabeled simple connected graphs with n nodes of degree at most 3 and each node a member of exactly one cycle.at n=27A380805