Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and all main diagonal and antidiagonal elements zero.
A162035
Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and all main diagonal and antidiagonal elements zero.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =40a(5) =305a(6) =12691a(7) =293917a(8) =64666609a(9) =4777061942
External references
- oeis: A162035