a(n) = 5000*n^2 - 200*n + 1.

Terms

a(0) =4801a(1) =19601a(2) =44401a(3) =79201a(4) =124001a(5) =178801a(6) =243601a(7) =318401a(8) =403201a(9) =498001a(10) =602801a(11) =717601a(12) =842401a(13) =977201a(14) =1122001a(15) =1276801a(16) =1441601a(17) =1616401a(18) =1801201a(19) =1996001a(20) =2200801a(21) =2415601a(22) =2640401a(23) =2875201a(24) =3120001a(25) =3374801a(26) =3639601