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Search: id:A117635
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| A117635 |
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Royal elements sequence from A018226 plus closed next shell at 168: H,B,Cl,Mn,Ag,Au,X(Unknown). |
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1
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OFFSET
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0,2
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COMMENT
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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.
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FORMULA
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a(n) = Abs[A018226[n]-3]
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CROSSREFS
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Cf. A018226.
Sequence in context: A097434 A106012 A063588 this_sequence A018447 A068829 A090403
Adjacent sequences: A117632 A117633 A117634 this_sequence A117636 A117637 A117638
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KEYWORD
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nonn,uned,probation
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 08 2006
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