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 absolute value of x(i,j)-x(i-1,j) in the j direction.
A250901
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 absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =413a(1) =1450a(2) =4388a(3) =12387a(4) =33821a(5) =91030a(6) =244200a(7) =657443a(8) =1784205a(9) =4894210a(10) =13588116a(11) =38193131a(12) =108619621a(13) =312200310a(14) =905600200a(15) =2647025819a(16) =7785177061a(17) =23009431986a(18) =68264323652a(19) =203115146611a(20) =605677397453
External references
- oeis: A250901