a(n) = 4*prime(n)^3 - 27*prime(n)^2 = (prime(n)^2)*[4*prime(n) - 27], n >= 4.

Terms

a(0) =49a(1) =2057a(2) =4225a(3) =11849a(4) =17689a(5) =34385a(6) =74849a(7) =93217a(8) =165649a(9) =230297a(10) =268105a(11) =355649a(12) =519665a(13) =727529a(14) =807457a(15) =1081849a(16) =1295537a(17) =1412185a(18) =1803649a(19) =2101145a(20) =2606009a(21) =3396649a(22) =3845777a(23) =4084465a(24) =4591049a(25) =4859329a(26) =5426825a(27) =7758049a(28) =8529017a(29) =9778649