867545domain: NAppears in sequencesT(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.at n=47A206871Number of 3 X n 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.at n=7A206872T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically.at n=47A206936