Number of (3+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.

A250732

Number of (3+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) =33a(1) =85a(2) =208a(3) =496a(4) =1158a(5) =2699a(6) =6257a(7) =14520a(8) =33640a(9) =77999a(10) =180744a(11) =419005a(12) =971109a(13) =2251135a(14) =5217807a(15) =12095192a(16) =28036004a(17) =64988500a(18) =150642356a(19) =349192782a(20) =809429294a(21) =1876272631a(22) =4349215350a(23) =10081551668a(24) =23369149689a(25) =54170034264

External references