%I #5 Apr 29 2015 16:06:13
%S 2,3,4,6,8,10,11,12,14,15,18,19,20,22,23,27,30,35,38,42,47,48,49,52,
%T 53,54,60,61,63,64,69,70,73,74,83,85,87,89,92,94,97,102,112,114,116,
%U 117,120,125,127,128,134,136,139,146,149,151,153,155,156,158,159
%N Indices of primes in A257339.
%C A010051(a(n)) = 1.
%H Reinhard Zumkeller, <a href="/A257457/b257457.txt">Table of n, a(n) for n = 1..10000</a>
%o (Haskell)
%o a257457 n = a257457_list !! (n-1)
%o a257457_list = filter ((== 1) . a010051 . a257339) [1..]
%Y Cf. A257339, A010051, A257458.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Apr 24 2015