a(n) = Sum_{j=1..n} j*prime(j).

Terms

a(0) =2a(1) =8a(2) =23a(3) =51a(4) =106a(5) =184a(6) =303a(7) =455a(8) =662a(9) =952a(10) =1293a(11) =1737a(12) =2270a(13) =2872a(14) =3577a(15) =4425a(16) =5428a(17) =6526a(18) =7799a(19) =9219a(20) =10752a(21) =12490a(22) =14399a(23) =16535a(24) =18960a(25) =21586a(26) =24367a(27) =27363a(28) =30524a(29) =33914