a(n) = prime(n) * prime(n^2) - prime(n^3).

Terms

a(0) =2a(1) =2a(2) =12a(3) =60a(4) =376a(5) =642a(6) =1550a(7) =2238a(8) =4118a(9) =7770a(10) =9534a(11) =15846a(12) =21966a(13) =26490a(14) =35750a(15) =46934a(16) =63204a(17) =73164a(18) =94248a(19) =112812a(20) =128922a(21) =161128a(22) =185576a(23) =225062a(24) =278260a(25) =315108a(26) =347596a(27) =393898a(28) =426998a(29) =478078