a(n) = (prime(n)^5 - prime(n)^4)/2.

Terms

a(0) =8a(1) =81a(2) =1250a(3) =7203a(4) =73205a(5) =171366a(6) =668168a(7) =1172889a(8) =3078251a(9) =9901934a(10) =13852815a(11) =33734898a(12) =56515220a(13) =71794821a(14) =112232663a(15) =205152506a(16) =351403469a(17) =415375230a(18) =664986993a(19) =889408835a(20) =1022336676a(21) =1519053159a(22) =1945791161a(23) =2760658604a(24) =4249405488a(25) =5203020050a(26) =5740094931a(27) =6947218853