OFFSET
1,1
COMMENTS
Essentially 2 followed by the first terms of A093907.
This puts Hydrogen and Helium in the first row, Lithium and Beryllium into the second, Boron to Magnesium into the third etc.
LINKS
Mark R. Leach, The Internet Database of Periodic Tables, Chemogenesis web book.
Albert Tarantola, PSE of Elements (Janet form).
Mark J. Winter, Image of the Janet long format (or 32-column) periodic table, Web Elements Chemistry Nexus.
MATHEMATICA
Flatten@ Table[2 (n #)^2 & /@ {-1, 1}, {n, 4}] (* Michael De Vlieger, Jul 22 2016 *)
CROSSREFS
KEYWORD
nonn,less,fini,full
AUTHOR
Paul Curtz, Apr 26 2008
EXTENSIONS
Edited by R. J. Mathar, Oct 02 2009
STATUS
approved