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%I #6 Mar 31 2012 10:22:30
%S 0,0,2,0,0,0,0,2,0,2,0,0,0,1,3,0,0,0,0,0,4,0,0,2,0,0,0,4,0,0,0,0,0,0,
%T 4,4,0,0,0,0,0,0,0,0,3,0,0,2,0,0,0,1,0,0,4,0,0,0,0,0,0,0,4,0,0,4,0,0,
%U 0,0,0,0,0,0,0,0,0,6,0,3,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,4
%N a(n) is the number of central quotients of simple compact Lie groups of dimension n
%e a(3) = 2 since the 3-dimensional SU(2) has two central quotients: SU(2) and SU(2)/2 = SO(3).
%e The unusually large value a(78) = 6 is due to the simple Lie groups Spin(13), Sp(6), and E_6 each of dimension 78 and each having two central quotients.
%K nonn
%O 1,3
%A _Andrew Rupinski_, Dec 18 2010
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