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A138096
Number of elements in the n-th column of the second extension of the Mendeleyev-Seaborg periodic table of elements.
3
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.
CROSSREFS
KEYWORD
nonn,easy,fini,full,less
AUTHOR
Paul Curtz, May 03 2008
STATUS
approved