A217923 F-block elements for Janet periodic table.

57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102

Offset: 1

Author

Jean-François Alcover, Oct 15 2012

Keywords

• nonn
• tabf
• fini

Comments

From Paul Curtz, Oct 26 2012: (Start)

Tarantola's formulas for the Janet table:

Let D(n) = n*(n+1)*(n+2)/6 + (1-(-1)^n)*(n+1)/4 = A168380(n).

The row R at which the element with atomic number Z is to be placed is the unique value of R satisfying D(R-1) < Z <= D(R).

Once the row number R is determined, the column number is, from right to left, C = D(R) - Z + 1.

Example: Z=109. D(7) < Z <= D(8) = 120. C = 120 - 109 + 1 = 12. (End)

Links

• Wikipedia, The Janet periodic table

Crossrefs

Cf. A160914 (s-block), A138469 (p-block), A199934 (d-block).

Programs

Mathematica

Join[Range[57,70], Range[89,102]]