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

Terms

a(0) =-1a(1) =1a(2) =8a(3) =19a(4) =34a(5) =77a(6) =124a(7) =175a(8) =218a(9) =249a(10) =436a(11) =515a(12) =646a(13) =825a(14) =956a(15) =1047a(16) =1228a(17) =1373a(18) =1800a(19) =2019a(20) =2378a(21) =2581a(22) =3024a(23) =3143a(24) =3316a(25) =4021a(26) =4592a(27) =4987a(28) =5490a(29) =5741