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A213746
Position in alphabet of first letter of symbol for chemical element with atomic number n.
0
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, 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, 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
OFFSET
1,1
COMMENTS
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.
a(114) = 6 and a(116) = 12.
EXAMPLE
a(3) = 12 because Lithium is Li and the first letter of Li is L.
MATHEMATICA
Table[ToCharacterCode[StringTake[ElementData[i, "Abbreviation"], 1]][[1]] - 64, {i, 112}] (* T. D. Noe, Oct 01 2012 *)
CROSSREFS
Sequence in context: A298916 A329032 A001732 * A219236 A259532 A329822
KEYWORD
nonn,fini,word
AUTHOR
J. Lowell, Jun 19 2012, corrected Oct 01 2012
EXTENSIONS
a(113)-a(118) from J. Lowell, Dec 08 2016
STATUS
approved