A138096 Number of elements in the n-th column of the second extension of the Mendeleyev-Seaborg periodic table of elements.

7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 6, 6, 7

Offset

1,1

Comments

A variant of A134982, with one term "4" changing place because (relative to the first table) the two elements number 21 and 39 are moved over to the next column of d-metals, placed above element 71.

Links

Table of n, a(n) for n=1..32.

Crossrefs

Cf. A137583, A093907, A134984, A135559.

Sequence in context: A198925 A355923 A260333 * A258010 A011102 A323098

Adjacent sequences: A138093 A138094 A138095 * A138097 A138098 A138099

Keyword

nonn,easy,fini,full,less

Author

Paul Curtz, May 03 2008

Status

approved