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%I #4 Dec 05 2013 19:56:14
%S 1,421,21649,649877,49877939,8779391081,77939108112221,
%T 9391081122211463,39108112221146315203,10811222114631520316143,
%U 81122211463152031614318511,12221146315203161431851120217
%N a(1) = 1 and then primes arising in A083192. Concatenation of n-th term to (2n-1)th term of A083192.
%e 421, 21649, etc. are primes.
%Y Cf. A083192.
%K base,nonn
%O 1,2
%A _Amarnath Murthy_, Apr 27 2003
%E Correct a(6)=8779391081 and extended by _Ray Chandler_, Jan 04 2009
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