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n-th 8k+3 prime plus n-th 8k+5 prime.
1

%I #6 Sep 30 2013 18:39:23

%S 8,24,48,80,112,128,184,216,280,296,336,360,408,456,520,560,600,648,

%T 696,752,808,840,888,952,1008,1064,1104,1176,1224,1248,1296,1344,1368,

%U 1416,1448,1512,1584,1632,1656,1712,1760,1848,1944,1984,2040

%N n-th 8k+3 prime plus n-th 8k+5 prime.

%F a(n) = A007520(n) + A007521(n). - _Michel Marcus_, Sep 30 2013

%o (PARI) lista(nn) = {prm = primes(nn); tp = select(p->(Mod(p,8)==3), prm); fp = select(p->(Mod(p, 8)==5), prm); for (i = 1, min(#tp, #fp), print1(tp[i] + fp[i], ", "););} \\ _Michel Marcus_, Sep 30 2013

%K nonn

%O 1,1

%A _Clark Kimberling_