Number of 7Xn 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.
A223870
Number of 7Xn 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.
Terms
- a(0) =120a(1) =14400a(2) =857696a(3) =30627033a(4) =740441932a(5) =13140481520a(6) =181330154458
External references
- oeis: A223870