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%I #3 Mar 30 2012 17:34:20
%S 1,5,17,25,47,79,165
%N Royal elements sequence from A018226 plus closed next shell at 168: H,B,Cl,Mn,Ag,Au,X(Unknown).
%C The 168 (168-3) is arrived at as the inert gas state electrically when the next f electrons and the first g electrons are filled. It also agrees with the Meastro sequence at 13^2. This approach predicts a relatively stable state about 16 neutrons/protons lower than the Pythagoren approach mentioned in A018226. 168 also has the benefit of being the Klein SPL(2,7) and Fano projective Plane group element number in a geodetic geometric model.
%F a(n) = Abs[A018226[n]-3]
%Y Cf. A018226.
%K nonn,uned
%O 0,2
%A _Roger L. Bagula_, Apr 08 2006
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