Number of (7+1)X(n+1) 0..1 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.

A250736

Number of (7+1)X(n+1) 0..1 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) =275a(1) =513a(2) =1418a(3) =3807a(4) =9728a(5) =23941a(6) =57397a(7) =135645a(8) =317769a(9) =741367a(10) =1725118a(11) =4010707a(12) =9318138a(13) =21648961a(14) =50290988a(15) =116846565a(16) =271483896a(17) =630867956a(18) =1466032586a(19) =3407186212a(20) =7918751613a(21) =18405536442a(22) =42780485640a(23) =99440346555a(24) =231144060876

External references