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

A250798

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

Terms

    a(0) =10a(1) =24a(2) =54a(3) =118a(4) =252a(5) =530a(6) =1102a(7) =2272a(8) =4654a(9) =9486a(10) =19260a(11) =38986a(12) =78726a(13) =158672a(14) =319318a(15) =641830a(16) =1288828a(17) =2586018a(18) =5185566a(19) =10393024a(20) =20821470a(21) =41700254a(22) =83493244a(23) =167136538a(24) =334515862a(25) =669424560a(26) =1339484742a(27) =2679997942a(28) =5361659964

External references