a(n) = p^5 - p^3 + p^2, where p = prime(n).

Terms

a(0) =28a(1) =225a(2) =3025a(3) =16513a(4) =159841a(5) =369265a(6) =1415233a(7) =2469601a(8) =6424705a(9) =20487601a(10) =28600321a(11) =69294673a(12) =115788961a(13) =146930785a(14) =229243393a(15) =418049425a(16) =714722401a(17) =844373041a(18) =1349828833a(19) =1803876481a(20) =2072687905a(21) =3076569601a(22) =3938475745a(23) =5583362401a(24) =8586436993a(25) =10509080401a(26) =11591658625a(27) =14024303713a(28) =15384956401