%I #3 Mar 30 2012 16:50:47
%S 0,0,0,4,10,31,175
%N Independence number of commuting graph of symmetric group S_n.
%C The graph is empty for n = 0, 1 and 2, so a(n) = 0 by convention (or should it be 1?).
%D A. Iranmanesh and A. Jafarzadeh, On the commuting graph associated with the symmetric and alternating groups, J. Algebra and Applic., 7 (2008), 129-146.
%K nonn
%O 0,4
%A _N. J. A. Sloane_, Mar 06 2008