a(n) = 625n^2 - 364n + 53.

Terms

a(0) =314a(1) =1825a(2) =4586a(3) =8597a(4) =13858a(5) =20369a(6) =28130a(7) =37141a(8) =47402a(9) =58913a(10) =71674a(11) =85685a(12) =100946a(13) =117457a(14) =135218a(15) =154229a(16) =174490a(17) =196001a(18) =218762a(19) =242773a(20) =268034a(21) =294545a(22) =322306a(23) =351317a(24) =381578a(25) =413089a(26) =445850a(27) =479861a(28) =515122a(29) =551633