Number of (n+1)X(n+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.
A250604
Number of (n+1)X(n+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) =11a(1) =64a(2) =297a(3) =1126a(4) =3691a(5) =10928a(6) =30113a(7) =78814a(8) =198651a(9) =486784a(10) =1167337a(11) =2752166a(12) =6400283a(13) =14716576a(14) =33517185a(15) =75712510a(16) =169810507a(17) =378463376a(18) =838772201a(19) =1849580902a(20) =4059957771
External references
- oeis: A250604