a(n) = (10*n + 3)^5.

Terms

a(0) =243a(1) =371293a(2) =6436343a(3) =39135393a(4) =147008443a(5) =418195493a(6) =992436543a(7) =2073071593a(8) =3939040643a(9) =6956883693a(10) =11592740743a(11) =18424351793a(12) =28153056843a(13) =41615795893a(14) =59797108943a(15) =83841135993a(16) =115063617043