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%I #3 Mar 30 2012 17:33:54
%S 1,3,11,19,37,4,12,20,38,21,39,22,40,23,41,24,42,25,43,26,44,27,45,28,
%T 46,29,47,30,48,5,13,31,49,6,14,32,50,7,15,33,51,8,16,34,52,9,17,35,
%U 53,2,10,18,36,54
%N Atomic numbers of the periodic table of the elements, read downwards along 18 columns, up to the 5th period.
%C This finite sequence has 54 members. Atomic numbers > 54 are not members.
%e ===========================================================
%e ........... THE PERIODIC TABLE OF THE ELEMENTS ............
%e ===========================================================
%e P/G: 1A 2A 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A
%e ===========================================================
%e (1): .1 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .2
%e (2): .3 .4 .. .. .. .. .. .. .. .. .. .. .5 .6 .7 .8 .9 10
%e (3): 11 12 .. .. .. .. .. .. .. .. .. .. 13 14 15 16 17 18
%e (4): 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
%e (5): 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
%e ===========================================================
%Y Cf. A099955, A134984, A138724, A138725, A138726, A138727.
%K easy,fini,full,nonn,tabf
%O 1,2
%A _Omar E. Pol_, Mar 26 2008, Jan 25 2009
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