n-th 6k+1 prime plus n-th 6k+5 prime.

Terms

a(0) =12a(1) =24a(2) =36a(3) =54a(4) =66a(5) =84a(6) =108a(7) =120a(8) =132a(9) =150a(10) =180a(11) =192a(12) =210a(13) =234a(14) =252a(15) =282a(16) =294a(17) =312a(18) =348a(19) =366a(20) =378a(21) =402a(22) =420a(23) =456a(24) =474a(25) =510a(26) =528a(27) =540a(28) =570a(29) =582