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%I #3 Mar 30 2012 17:26:11
%S 3,297,4,7,12,45,330,391,82,85,92,121,251,124,214,129,304,130,353,131,
%T 137,139,144,160,163,192,286,340,146,315,150,151,158,144,160,163,192,
%U 286,340,144,160,163,192,286,340,170,172,144,160,163,192,286,340,207
%N Positions of prime numbers A104820 in A104819.
%F A104821(n)=Position[A104819, A104820(n)]
%Y Cf. A104807, A104819, A104820.
%K nonn,base
%O 1,1
%A _Zak Seidov_, Mar 27 2005
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