a(n) = 529*n^2 - 2*n.

Terms

a(0) =527a(1) =2112a(2) =4755a(3) =8456a(4) =13215a(5) =19032a(6) =25907a(7) =33840a(8) =42831a(9) =52880a(10) =63987a(11) =76152a(12) =89375a(13) =103656a(14) =118995a(15) =135392a(16) =152847a(17) =171360a(18) =190931a(19) =211560a(20) =233247a(21) =255992a(22) =279795a(23) =304656a(24) =330575a(25) =357552a(26) =385587a(27) =414680a(28) =444831a(29) =476040