Number of nonnegative integer matrices with nonzero rows, total sum n and columns with equal sums.
A331636
Number of nonnegative integer matrices with nonzero rows, total sum n and columns with equal sums.
Terms
- a(0) =1a(1) =5a(2) =17a(3) =109a(4) =557a(5) =5785a(6) =47357a(7) =596365a(8) =7151841a(9) =106763725a(10) =1622633597a(11) =28757539337a(12) =526858352477
External references
- oeis: A331636