%I #6 Dec 15 2017 17:36:44
%S 607,809,20021,36037,38039,42043,48049,50051,66067,72073,78079,96097,
%T 1280129,1400141,1500151,1520153,1880189,2120213,2160217,2180219,
%U 2720273,2960297,3000301,3180319,3300331,3360337,3600361,3660367
%N Primes of form n.0.n+1, where '.' represents concatenation. Or, primes of form 10^(k+1)*n + n + 1, where k is the number of digits in n.
%H Robert Israel, <a href="/A096525/b096525.txt">Table of n, a(n) for n = 1..10000</a>
%p select(isprime,[seq(x+1+x*10^(2+ilog10(x+1)),x=2..1000,2)]); # _Robert Israel_, Nov 13 2017
%Y Cf. A096524.
%K base,easy,nonn
%O 1,1
%A _Jason Earls_, Jun 23 2004