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Union_i p(4i+2), p(4i+3), where p(k) = k-th prime.
3

%I #3 Mar 30 2012 16:49:04

%S 3,5,13,17,29,31,43,47,61,67,79,83,101,103,113,127,139,149,163,167,

%T 181,191,199,211,229,233,251,257,271,277,293,307,317,331,349,353,373,

%U 379,397,401,421,431,443,449,463,467,491,499,521,523,557

%N Union_i p(4i+2), p(4i+3), where p(k) = k-th prime.

%Y Cf. A060191, A060193, A060194.

%K nonn

%O 0,1

%A _N. J. A. Sloane_, Mar 21 2001