Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #10 Jul 24 2016 22:24:42
%S 2,1,8,7,6,5,4,3,2,1,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,32,
%T 31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,
%U 8,7,6,5,4,3,2,1,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31
%N Count downwards from 2, then from 8, then from 18, then from ... 2*k^2, k>=1.
%C Janet's extended enumeration of the periodic table of the elements.
%C The table is read from the right to the left.
%D Charles Janet, La structure du Noyau de l'atome,consideree dans la Classification periodique des elements chimiques, Nov. 1927, N. 2, Beauvais, 67 pages, 3 leafleats, see page 15.
%D Charles Janet, Considerations sur la structure du noyau de l'atome, Dec 1929, N 5, Beauvais, 2+45 pp.,4 leaflets, see leaflets 2 and 3.
%t Table[Reverse@ Range[2 n^2], {n, 5}] // Flatten (* _Michael De Vlieger_, Jul 22 2016 *)
%Y Cf. A138100, A138101, A093907, A137583, A172002.
%K nonn
%O 1,1
%A _Paul Curtz_, Nov 19 2009
%E Edited by _R. J. Mathar_, Feb 15 2010