%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