Number of (n+1)X(4+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.
A250938
Number of (n+1)X(4+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) =2247a(1) =15431a(2) =87529a(3) =444421a(4) =2067987a(5) =8976385a(6) =36809498a(7) =144007880a(8) =541598982a(9) =1969991292a(10) =6964460154a(11) =24028268136a(12) =81182285391a(13) =269383972831a(14) =880117983928
External references
- oeis: A250938