Number of (n+1) X (1+1) 0..2 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.

A250625

Number of (n+1) X (1+1) 0..2 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) =36a(1) =125a(2) =380a(3) =1072a(4) =2856a(5) =7307a(6) =18131a(7) =43966a(8) =104755a(9) =246252a(10) =572894a(11) =1322172a(12) =3032579a(13) =6922433a(14) =15743520a(15) =35703349a(16) =80791394a(17) =182511840a(18) =411772666a(19) =928103255a(20) =2090301223a(21) =4705147230a(22) =10586418861a(23) =23811245592a(24) =53543550752

External references