Number 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.

A250605

Number 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.

Terms

    a(0) =26a(1) =64a(2) =140a(3) =290a(4) =586a(5) =1172a(6) =2336a(7) =4654a(8) =9278a(9) =18512a(10) =36964a(11) =73850a(12) =147602a(13) =295084a(14) =590024a(15) =1179878a(16) =2359558a(17) =4718888a(18) =9437516a(19) =18874738a(20) =37749146a(21) =75497924a(22) =150995440a(23) =301990430a(24) =603980366a(25) =1207960192a(26) =2415919796a(27) =4831838954

External references