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Essentially a duplicate of A005843.
2

%I #9 Feb 09 2012 18:57:09

%S 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48

%N Essentially a duplicate of A005843.

%K dead

%O 1,1