%I #3 Mar 30 2012 16:50:13
%S 3,15,23,27,35,39,47,59
%N Primitive exponents of the Weyl group W(E_8).
%D C. Chevalley, The Betti numbers of the exceptional Lie groups, pp. 21-24 of Proc. Internat Congress Math., Cambridge 1950, Amer. Math. Soc., 1952.
%F Equals 2*A005776(n) + 1.
%Y Cf. A106373, A106374, A106403, A005556, A005763.
%K nonn,fini,full
%O 1,1
%A _N. J. A. Sloane_, May 30 2005