%I #3 Mar 30 2012 18:56:01
%S 1,12,119,1090,9592,82432,697615,5841606,48541826,401049352,
%T 3298721384,27037279984,220976019552,1801829443072,14663530220175,
%U 119138596786414,966631388383438,7833369734693512
%N a(n) = (1/2)*(3rd elementary symmetric function of C(n,0), C(n,1), ..., C(n,n)).
%K nonn
%O 2,2
%A _Clark Kimberling_
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