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%I #18 Dec 30 2023 13:31:28
%S 0,0,0,10,180,2080,19734,168058,1340976,10264852,76448538,558877726,
%T 4033727412,28855065304,2051229655024
%N Number of 4-cycles in the n-Mycielski graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/MycielskiGraph.html">Mycielski Graph</a>.
%Y Cf. A301769 (5-cycles).
%K nonn,more
%O 1,4
%A _Eric W. Weisstein_, Dec 07 2023
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