a(n) = p(n^2*p(n)), where p(x) is the least prime > x.

Terms

a(0) =2a(1) =3a(2) =13a(3) =47a(4) =83a(5) =179a(6) =257a(7) =541a(8) =709a(9) =907a(10) =1103a(11) =1579a(12) =1873a(13) =2879a(14) =3343a(15) =3833a(16) =4357a(17) =5501a(18) =6163a(19) =8311a(20) =9203a(21) =10151a(22) =11149a(23) =15349a(24) =16729a(25) =18127a(26) =19609a(27) =21143a(28) =22739a(29) =26083