Number of non-isomorphic n X n nonnegative integer symmetric matrices with all row and column sums equal to n up to permutations of rows and columns.
A333738
Number of non-isomorphic n X n nonnegative integer symmetric matrices with all row and column sums equal to n up to permutations of rows and columns.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =33a(5) =556a(6) =31781a(7) =5882230a(8) =3589936407
External references
- oeis: A333738