a(n) = (12*n + 5)^5.

Terms

a(0) =3125a(1) =1419857a(2) =20511149a(3) =115856201a(4) =418195493a(5) =1160290625a(6) =2706784157a(7) =5584059449a(8) =10510100501a(9) =18424351793a(10) =30517578125a(11) =48261724457a(12) =73439775749a(13) =108175616801a(14) =154963892093a(15) =216699865625a(16) =296709280757a(17) =398778220049a(18) =527182965101a(19) =686719856393a(20) =882735153125