Number of n X n (0,1) matrices with all column and row sums equal to 4.
A058528
Number of n X n (0,1) matrices with all column and row sums equal to 4.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =120a(6) =67950a(7) =68938800a(8) =116963796250
External references
- oeis: A058528