a(n) = 961*n^2 - 31.

Terms

a(0) =930a(1) =3813a(2) =8618a(3) =15345a(4) =23994a(5) =34565a(6) =47058a(7) =61473a(8) =77810a(9) =96069a(10) =116250a(11) =138353a(12) =162378a(13) =188325a(14) =216194a(15) =245985a(16) =277698a(17) =311333a(18) =346890a(19) =384369a(20) =423770a(21) =465093a(22) =508338a(23) =553505a(24) =600594a(25) =649605a(26) =700538a(27) =753393a(28) =808170a(29) =864869