a(n) = 225*n^2 - 199*n + 44.

Terms

a(0) =44a(1) =70a(2) =546a(3) =1472a(4) =2848a(5) =4674a(6) =6950a(7) =9676a(8) =12852a(9) =16478a(10) =20554a(11) =25080a(12) =30056a(13) =35482a(14) =41358a(15) =47684a(16) =54460a(17) =61686a(18) =69362a(19) =77488a(20) =86064a(21) =95090a(22) =104566a(23) =114492a(24) =124868a(25) =135694a(26) =146970a(27) =158696a(28) =170872a(29) =183498