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%I A213746 #30 Dec 10 2016 03:26:17
%S A213746 8,8,12,2,2,3,14,15,6,14,14,13,1,19,16,19,3,1,11,3,19,20,22,3,13,6,3,
%T A213746 14,3,26,7,7,1,19,2,11,18,19,25,26,14,13,20,18,18,16,1,3,9,19,19,20,9,
%U A213746 24,3,2,12,3,16,14,16,19,5,7,20,4,8,5,20,25,12,8,20,23,18,15,9,16,1,8,20,16,2,16,1,18,6,18,1,20,16,21,14,16,1,3,2,3,5,6,13,14,12,18,4,19,2,8,13,4,18,3,14,6,13,12,20,15
%N A213746 Position in alphabet of first letter of symbol for chemical element with atomic number n.
%C A213746 The symbol, not the name, decides the value. For example, Sodium starts with S, but the symbol is Na, and Na starts with N, so a(11) = 14.
%C A213746 a(114) = 6 and a(116) = 12.
%H A213746 Wikipedia, <a href="/load/view.php?a=aHR0cHM6Ly9lbi53aWtpcGVkaWEub3JnL3dpa2kvTGlzdF9vZl9jaGVtaWNhbF9lbGVtZW50cw">List of chemical elements</a>
%e A213746 a(3) = 12 because Lithium is Li and the first letter of Li is L.
%t A213746 Table[ToCharacterCode[StringTake[ElementData[i, "Abbreviation"], 1]][[1]] - 64, {i, 112}] (* _T. D. Noe_, Oct 01 2012 *)
%K A213746 nonn,fini,word
%O A213746 1,1
%A A213746 _J. Lowell_, Jun 19 2012, corrected Oct 01 2012
%E A213746 a(113)-a(118) from _J. Lowell_, Dec 08 2016

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