Number of n X n 0..1 arrays with rows unimodal and columns nondecreasing.
A225006
Number of n X n 0..1 arrays with rows unimodal and columns nondecreasing.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =50a(4) =295a(5) =1792a(6) =11088a(7) =69498a(8) =439791a(9) =2803658a(10) =17978389a(11) =115837592a(12) =749321716a(13) =4863369656a(14) =31655226108a(15) =206549749930
External references
- oeis: A225006