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%I #2 Mar 30 2012 17:33:49
%S 1,2,4,5,6,7,8,9,10,11,12,13,15,16,17,18,19,20,21,22,23,24,25,26,27,
%T 28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,
%U 51,52,53,54,55,56,57,58,59,60,61,62,63,64
%N Even imperfect numbers, divided by 2.
%Y Cf. A005843, A014335, A014445, A014494, A026503, A028334. Imperfect numbers: A132999.
%K easy,nonn
%O 1,2
%A _Omar E. Pol_, Oct 20 2007
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