A168142 - 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