A137575 - OEIS

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A137575

Successive structures central number of Seaborg's periodic table of the elements (extended to 32 columns) for odd rows.

1, 2, 8, 8, 8, 8, 8, 8, 8, 8, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32

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OFFSET

1,2

COMMENTS

Note that 60 is half of 120, the number of elements in Charles Janet's 32-column table. This implies the existence of element 119, Ununennium (structure last number is 9) and element 120, Unbinilium (10). Structure of element 117, Ununseptium, is unknown.

LINKS

Table of n, a(n) for n=1..60.

FORMULA

60 terms: 2 (2's) (1,2) + 8 (8's) + 18 (18's) + 32 (32's).

CROSSREFS

Cf. A134984, 118 elements.

Sequence in context: A243596 A256849 A138300 * A360780 A183393 A284781

Adjacent sequences: A137572 A137573 A137574 * A137576 A137577 A137578

KEYWORD

nonn,uned

AUTHOR

Paul Curtz, Apr 26 2008

STATUS

approved