Number of (5+1)X(n+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.

A250637

Number of (5+1)X(n+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) =2856a(1) =20743a(2) =134878a(3) =747039a(4) =3719562a(5) =17202711a(6) =75537881a(7) =319253573a(8) =1310889946a(9) =5265378033a(10) =20784710664a(11) =80962828536a(12) =312026929609

External references