a(n) = n^4 + 324.

Terms

a(0) =324a(1) =325a(2) =340a(3) =405a(4) =580a(5) =949a(6) =1620a(7) =2725a(8) =4420a(9) =6885a(10) =10324a(11) =14965a(12) =21060a(13) =28885a(14) =38740a(15) =50949a(16) =65860a(17) =83845a(18) =105300a(19) =130645a(20) =160324a(21) =194805a(22) =234580a(23) =280165a(24) =332100a(25) =390949a(26) =457300a(27) =531765a(28) =614980a(29) =707605