Number of (2+1) X (n+1) 0..3 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.

A250854

Number of (2+1) X (n+1) 0..3 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) =543a(1) =2457a(2) =8037a(3) =21436a(4) =49599a(5) =103293a(6) =198297a(7) =356752a(8) =608671a(9) =993609a(10) =1562493a(11) =2379612a(12) =3524767a(13) =5095581a(14) =7209969a(15) =10008768a(16) =13658527a(17) =18354457a(18) =24323541a(19) =31827804a(20) =41167743a(21) =52685917a(22) =66770697a(23) =83860176a(24) =104446239a(25) =129078793

External references