Number of (n+1)X(2+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.
A250936
Number of (n+1)X(2+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) =155a(1) =699a(2) =2812a(3) =10528a(4) =37477a(5) =128507a(6) =428095a(7) =1394237a(8) =4460779a(9) =14073313a(10) =43911559a(11) =135823357a(12) =417243011a(13) =1274860729a(14) =3878857343a(15) =11762928117a(16) =35580876923a(17) =107413523505a(18) =323772483447a(19) =974796593517
External references
- oeis: A250936