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 x(i,j)+x(i-1,j) in the j direction.

A250881

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 x(i,j)+x(i-1,j) in the j direction.

Terms

    a(0) =8736a(1) =30360a(2) =73122a(3) =144248a(4) =250964a(5) =400496a(6) =600070a(7) =856912a(8) =1178248a(9) =1571304a(10) =2043306a(11) =2601480a(12) =3253052a(13) =4005248a(14) =4865294a(15) =5840416a(16) =6937840a(17) =8164792a(18) =9528498a(19) =11036184a(20) =12695076a(21) =14512400a(22) =16495382a(23) =18651248a(24) =20987224a(25) =23510536a(26) =26228410

External references