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%I #7 Apr 14 2015 09:59:31
%S 3,7,12,11,15,14,17,24,29,28,36,35,34,31,30,47,50,52,56,58,59,63,66,
%T 25,77,74,92,89,102,101,109,107,106,105,83,116,128,125,124,143,142,
%U 141,135,131,147,154,155,156,103,171,99,96,95,145,189,259,178,177
%N Indices of semiprimes in A166133.
%H Reinhard Zumkeller and Ray Chandler, <a href="/A256563/b256563.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Reinhard Zumkeller)
%F a(n) = A255833(A001358(n)). - _Ray Chandler_, Apr 14 2015
%o (Haskell)
%o a256563 = (+ 1) . fromJust . (`elemIndex` a166133_list) . a001358
%Y Cf. A166133, A256561, A255833, A001358.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Apr 02 2015
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