Number of (n+1)X(1+1) 0..1 arrays with nondecreasing min(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.
A250461
Number of (n+1)X(1+1) 0..1 arrays with nondecreasing min(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) =11a(1) =31a(2) =85a(3) =233a(4) =637a(5) =1741a(6) =4757a(7) =12997a(8) =35509a(9) =97013a(10) =265045a(11) =724117a(12) =1978325a(13) =5404885a(14) =14766421a(15) =40342613a(16) =110218069a(17) =301121365a(18) =822678869a(19) =2247600469a(20) =6140558677a(21) =16776318293a(22) =45833753941a(23) =125220144469a(24) =342107796821
External references
- oeis: A250461