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%I #6 Mar 30 2012 16:52:07
%S 126,448,55476,7482240
%N Size of second-order intersection graph of the matching graph G_n.
%C There are presumably earlier terms in the sequence, but the reference does not give them.
%D Larrion, F.; Pizana, M. A.; and Villarroel-Flores, R.; The clique operator on matching and chessboard graphs. Discrete Math. 309 (2009), no. 1, 85-93.
%K nonn
%O 7,1
%A _N. J. A. Sloane_, Dec 01 2011
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