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%I #2 Mar 30 2012 17:33:54
%S 11,11000,1100011111,11000111110000000,1100011111000000011111111111,
%T 11000111110000000111111111110000000000000,
%U 1100011111000000011111111111000000000000011111111111111111
%N Concatenation of first n runs of A138149 (related to prime numbers).
%Y Cf. A000040, A138149.
%K base,easy,nonn
%O 1,1
%A _Omar E. Pol_, Mar 29 2008