Number of square matrices with nonnegative integer entries and without zero rows or columns such that sum of all entries is equal to n.
A120732
Number of square matrices with nonnegative integer entries and without zero rows or columns such that sum of all entries is equal to n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =107a(5) =991a(6) =11267a(7) =151721a(8) =2360375a(9) =41650861a(10) =821881709a(11) =17932031225a(12) =428630422697
External references
- oeis: A120732