a(n) = Sum_{p <= n <= q < 2n, p,q prime} (p * q).

Terms

a(0) =0a(1) =10a(2) =40a(3) =60a(4) =120a(5) =180a(6) =527a(7) =408a(8) =697a(9) =1020a(10) =1680a(11) =2016a(12) =2952a(13) =2419a(14) =3608a(15) =4879a(16) =6902a(17) =5916a(18) =10703a(19) =9240a(20) =12397a(21) =15708a(22) =20400a(23) =22800a(24) =22800a(25) =22800a(26) =28100a(27) =28100a(28) =36249a(29) =40119