%I #9 Jul 05 2016 02:48:23
%S 37,61,71,163,173,193,367,397,479,499,521,541,571,601,631,641,661,691,
%T 701,751,761,811,821,881,911,941,971,991,1523,1543,1553,1583,1613,
%U 1663,1693,1723,1733,1753,1783,1823,1873,1913,1933,1973,1993,3517,3527,3547
%N Primes n with property that first digit of 2*n = last digit of n.
%C Or, primes in A167994.
%H G. C. Greubel, <a href="/A168006/b168006.txt">Table of n, a(n) for n = 1..1000</a>
%e 2*37=74, 2*61=122.
%t Select[Prime[Range[800]],First[IntegerDigits[2#]]==Last[ IntegerDigits[#]]&] (* _Harvey P. Dale_, May 27 2011 *)
%Y Cf. A167994.
%K base,nonn
%O 1,1
%A _Zak Seidov_, Nov 16 2009