a(n) = (12*n + 1)^5.

Terms

a(0) =1a(1) =371293a(2) =9765625a(3) =69343957a(4) =282475249a(5) =844596301a(6) =2073071593a(7) =4437053125a(8) =8587340257a(9) =15386239549a(10) =25937424601a(11) =41615795893a(12) =64097340625a(13) =95388992557a(14) =137858491849a(15) =194264244901a(16) =267785184193a(17) =362050628125a(18) =481170140857a(19) =629763392149a(20) =812990017201