Number of (n+1) X (3+1) 0..3 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.
A250686
Number of (n+1) X (3+1) 0..3 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) =2541a(1) =13906a(2) =74631a(3) =383440a(4) =1848953a(5) =8474002a(6) =37322413a(7) =159438246a(8) =665575403a(9) =2731006288a(10) =11064772389a(11) =44421077632a(12) =177194842907a(13) =703795289106
External references
- oeis: A250686