a(n) = (prime(n)+1)*n - 1.

Terms

a(0) =2a(1) =7a(2) =17a(3) =31a(4) =59a(5) =83a(6) =125a(7) =159a(8) =215a(9) =299a(10) =351a(11) =455a(12) =545a(13) =615a(14) =719a(15) =863a(16) =1019a(17) =1115a(18) =1291a(19) =1439a(20) =1553a(21) =1759a(22) =1931a(23) =2159a(24) =2449a(25) =2651a(26) =2807a(27) =3023a(28) =3189a(29) =3419