[seqfan] Another conjecture concerning Eulerian graphs: A084554 = A007127

Vladeta Jovovic vladeta at eunet.yu
Sun Mar 15 05:09:28 CET 2009



SeqFans,

A084554(n) is in fact number of switching classes of 2-multigraphs with n 
nodes

and

A007127(n) is in fact  number of  Eulerian 2-multigraphs with n nodes,

so conjecture A084554(n) = A007127(n)

would be a nice generalization of well known result of Mallows and  Sloane.

Vladeta 





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