(n-th 8k+3 prime plus n-th 8k+5 prime)/8.

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =14a(5) =16a(6) =23a(7) =27a(8) =35a(9) =37a(10) =42a(11) =45a(12) =51a(13) =57a(14) =65a(15) =70a(16) =75a(17) =81a(18) =87a(19) =94a(20) =101a(21) =105a(22) =111a(23) =119a(24) =126a(25) =133a(26) =138a(27) =147a(28) =153a(29) =156