n-th 8k+1 prime plus n-th 8k+7 prime.

Terms

a(0) =24a(1) =64a(2) =104a(3) =136a(4) =168a(5) =192a(6) =240a(7) =320a(8) =384a(9) =408a(10) =448a(11) =480a(12) =536a(13) =576a(14) =616a(15) =672a(16) =720a(17) =792a(18) =816a(19) =840a(20) =952a(21) =1008a(22) =1040a(23) =1072a(24) =1088a(25) =1120a(26) =1240a(27) =1280a(28) =1392a(29) =1416