A333887 Number of non-isomorphic 5 X 5 nonnegative integer symmetric matrices with all row and column sums equal to n up to permutations of rows and columns.

1, 1, 7, 29, 142, 556, 1919, 5793, 15758, 39131, 90185, 194905, 398773, 777708, 1454721, 2622421, 4575020, 7750397, 12787648, 20600441, 32473894, 50185556, 76161130, 113665307, 167041499, 242001146, 345981348, 488570133, 682023069, 941871068, 1287649789

Offset: 0

Author

Andrew Howroyd, Apr 08 2020

Keywords

• nonn

Crossrefs

Row n=5 of A333737.