Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.
A224140
Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.
Terms
- a(0) =2a(1) =9a(2) =49a(3) =272a(4) =1509a(5) =8375a(6) =46586a(7) =259927a(8) =1454873a(9) =8167578a(10) =45975525a(11) =259412481a(12) =1466771294a(13) =8308711329a(14) =47142516717a(15) =267868554552
External references
- oeis: A224140