152236domain: NAppears in sequencesNumber of gap-free but not complete compositions of n.at n=29A251729Number of n X 4 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1's.at n=7A295209T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s.at n=58A295213