Number of (3+1)X(n+1) 0..2 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.

A250635

Number of (3+1)X(n+1) 0..2 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) =380a(1) =2347a(2) =12151a(3) =56232a(4) =241742a(5) =994030a(6) =3951204a(7) =15376595a(8) =58841311a(9) =222800817a(10) =836506982a(11) =3124145109a(12) =11618627925a(13) =43097606337a(14) =159532886234a(15) =589803541517

External references