Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

A250724

Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Terms

    a(0) =50a(1) =110a(2) =208a(3) =365a(4) =600a(5) =942a(6) =1418a(7) =2065a(8) =2918a(9) =4022a(10) =5420a(11) =7165a(12) =9308a(13) =11910a(14) =15030a(15) =18737a(16) =23098a(17) =28190a(18) =34088a(19) =40877a(20) =48640a(21) =57470a(22) =67458a(23) =78705a(24) =91310a(25) =105382a(26) =121028a(27) =138365a(28) =157508a(29) =178582

External references