a(n) = 137*n^2 - 4043*n + 27277.

Terms

a(0) =27277a(1) =23371a(2) =19739a(3) =16381a(4) =13297a(5) =10487a(6) =7951a(7) =5689a(8) =3701a(9) =1987a(10) =547a(11) =-619a(12) =-1511a(13) =-2129a(14) =-2473a(15) =-2543a(16) =-2339a(17) =-1861a(18) =-1109a(19) =-83a(20) =1217a(21) =2791a(22) =4639a(23) =6761a(24) =9157a(25) =11827a(26) =14771a(27) =17989a(28) =21481a(29) =25247