a(n) = 3600*n^2 - 6049*n + 2541.

Terms

a(0) =92a(1) =4843a(2) =16794a(3) =35945a(4) =62296a(5) =95847a(6) =136598a(7) =184549a(8) =239700a(9) =302051a(10) =371602a(11) =448353a(12) =532304a(13) =623455a(14) =721806a(15) =827357a(16) =940108a(17) =1060059a(18) =1187210a(19) =1321561a(20) =1463112a(21) =1611863a(22) =1767814a(23) =1930965a(24) =2101316a(25) =2278867a(26) =2463618a(27) =2655569