OFFSET
0,2
COMMENTS
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.
FORMULA
a(n) = Abs[A018226[n]-3]
CROSSREFS
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, Apr 08 2006
STATUS
approved