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%I #3 Mar 30 2012 18:40:36
%S 13,17,18,20,21,27,28,30,32,41,42,43,46,47,49,53,55,56,58,59,63,69,72,
%T 75,81
%N Indices of semiprimes in A117322 prime(n) modulo semiprime(n).
%e a(1) = 13 because A117322(13) = prime(13) modulo semiprime(13) = 41 mod 35 = 6 = 2 * 3 is semiprime.
%e a(2) = 17 because A117322(17) = 59 mod 49 = 10 = 2 * 5 is semiprime.
%e a(3) = 18 because A117322(18) = 61 mod 51 = 10 = 2 * 5 is semiprime.
%e a(4) = 20 because A117322(20) = 71 mod 57 = 14 = 2 * 7 is semiprime.
%K easy,nonn
%O 1,1
%A _Jonathan Vos Post_, Mar 08 2006
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