Number of orderings of 1,2,...,n^2 in an n X n matrix such that each row, each column and both diagonals are increasing.
A039917
Number of orderings of 1,2,...,n^2 in an n X n matrix such that each row, each column and both diagonals are increasing.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =2017a(4) =21569213
External references
- oeis: A039917