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A126061 Number of letters in symbol for n-th element in periodic table. 0
1, 2, 2, 2, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..117.

Mark Winter, WebElements Periodic Table

EXAMPLE

H for hydrogen (one letter), He for helium (two letters), Li for lithium (two letters), Be for beryllium (two letters), B for boron (one letter), C for carbon (one letter), N for nitrogen (one letter), O for oxygen (one letter), F for fluorine (one letter), Ne for neon (two letters) etc.

CROSSREFS

Sequence in context: A128522 A025454 A327104 * A088496 A036602 A176166

Adjacent sequences:  A126058 A126059 A126060 * A126062 A126063 A126064

KEYWORD

nonn,fini

AUTHOR

Neven Juric (neven.juric(AT)apis-it.hr), Feb 28 2007, Mar 01 2007

EXTENSIONS

a(100)-a(118) from Charles R Greathouse IV, Jul 13 2016

STATUS

approved

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Last modified June 16 11:58 EDT 2021. Contains 345057 sequences. (Running on oeis4.)