Number of n X n 0-1 matrices with all column and row sums equal to 3.
A001501
Number of n X n 0-1 matrices with all column and row sums equal to 3.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =24a(5) =2040a(6) =297200a(7) =68938800a(8) =24046189440
External references
- oeis: A001501