Number of (0,1)-matrices with n ones, no zero rows or columns, and the same row sums as column sums.
A321733
Number of (0,1)-matrices with n ones, no zero rows or columns, and the same row sums as column sums.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =40a(5) =246a(6) =1816a(7) =15630a(8) =153592a(9) =1696760a(10) =20816358a(11) =280807868a(12) =4131117440a(13) =65823490088
External references
- oeis: A321733