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 x(i,j)-x(i-1,j) in the j direction.
A250523
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 x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =3123a(1) =18859a(2) =82023a(3) =300131a(4) =993123a(5) =3088923a(6) =9240559a(7) =26984403a(8) =77707851a(9) =222271083a(10) =634724183a(11) =1815888579a(12) =5216209523a(13) =15062616251a(14) =43743061503a(15) =127741126963a(16) =374944674139
External references
- oeis: A250523