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

Terms

a(0) =31a(1) =992a(2) =3875a(3) =8680a(4) =15407a(5) =24056a(6) =34627a(7) =47120a(8) =61535a(9) =77872a(10) =96131a(11) =116312a(12) =138415a(13) =162440a(14) =188387a(15) =216256a(16) =246047a(17) =277760a(18) =311395a(19) =346952a(20) =384431a(21) =423832a(22) =465155a(23) =508400a(24) =553567a(25) =600656a(26) =649667a(27) =700600a(28) =753455a(29) =808232