a(n) = n * prime(n).

Terms

a(0) =2a(1) =6a(2) =15a(3) =28a(4) =55a(5) =78a(6) =119a(7) =152a(8) =207a(9) =290a(10) =341a(11) =444a(12) =533a(13) =602a(14) =705a(15) =848a(16) =1003a(17) =1098a(18) =1273a(19) =1420a(20) =1533a(21) =1738a(22) =1909a(23) =2136a(24) =2425a(25) =2626a(26) =2781a(27) =2996a(28) =3161a(29) =3390