Number of (n+1)X(3+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
A250937
Number of (n+1)X(3+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =599a(1) =3355a(2) =16208a(3) =71014a(4) =289407a(5) =1115035a(6) =4106983a(7) =14585505a(8) =50276307a(9) =169096201a(10) =557285131a(11) =1805934757a(12) =5771010913a(13) =18228909727a(14) =57028425739a(15) =176997241191a(16) =545747652023
External references
- oeis: A250937