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%I #6 Dec 05 2013 19:57:04
%S 11,2,33,444,55,6,777777777777
%N a(1) = 11 then the least number of concatenation of n that gives prime when placed on the most significant side of the previous concatenation.
%C Contribution from _David Wasserman_, Dec 30 2008: (Start)
%C Next term has 634 digits.
%C A088061 gives the primes. (End)
%e 11,211,33211,44433211,5544433211,... are all primes.
%Y Cf. A088061. [From _David Wasserman_, Dec 30 2008]
%K base,nonn
%O 1,1
%A _Amarnath Murthy_, Aug 12 2005