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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

%I

%S 1,1,7,29,142,556,1919,5793,15758,39131,90185,194905,398773,777708,

%T 1454721,2622421,4575020,7750397,12787648,20600441,32473894,50185556,

%U 76161130,113665307,167041499,242001146,345981348,488570133,682023069,941871068,1287649789

%N 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.

%Y Row n=5 of A333737.

%K nonn

%O 0,3

%A _Andrew Howroyd_, Apr 08 2020

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Last modified May 21 18:55 EDT 2022. Contains 353926 sequences. (Running on oeis4.)