A303149 Group number of n-th element in the periodic table, or 0 if the element does not have a group number.

1, 18, 1, 2, 13, 14, 15, 16, 17, 18, 1, 2, 13, 14, 15, 16, 17, 18, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 6, 7, 8, 9

Offset

1,2

Comments

a(n) is 0 for the f-block elements.

Links

Table of n, a(n) for n=1..77.

Wikipedia, Block (periodic table) - f-block

Wikipedia, Group (periodic table)

Wikipedia, List of chemical elements

Wikipedia, Periodic table

Crossrefs

Cf. A138718.

Sequence in context: A040332 A040331 A040330 * A040334 A040333 A040335

Adjacent sequences: A303146 A303147 A303148 * A303150 A303151 A303152

Keyword

nonn,fini

Author

Felix Fröhlich, Apr 22 2018

Status

approved