a(n) = 441*n^2 - 488*n + 135.

Terms

a(0) =88a(1) =923a(2) =2640a(3) =5239a(4) =8720a(5) =13083a(6) =18328a(7) =24455a(8) =31464a(9) =39355a(10) =48128a(11) =57783a(12) =68320a(13) =79739a(14) =92040a(15) =105223a(16) =119288a(17) =134235a(18) =150064a(19) =166775a(20) =184368a(21) =202843a(22) =222200a(23) =242439a(24) =263560a(25) =285563a(26) =308448a(27) =332215a(28) =356864a(29) =382395