Number of (4+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

A250856

Number of (4+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Terms

    a(0) =12311a(1) =63631a(2) =223933a(3) =626416a(4) =1499679a(5) =3204951a(6) =6279401a(7) =11485528a(8) =19866631a(9) =32808359a(10) =52106341a(11) =80039896a(12) =119451823a(13) =173834271a(14) =247420689a(15) =345283856a(16) =473439991a(17) =638958943a(18) =850080461a(19) =1116336544a(20) =1448679871a(21) =1859618311

External references