a(n) = 484*n^2 + 2*n.

Terms

a(0) =486a(1) =1940a(2) =4362a(3) =7752a(4) =12110a(5) =17436a(6) =23730a(7) =30992a(8) =39222a(9) =48420a(10) =58586a(11) =69720a(12) =81822a(13) =94892a(14) =108930a(15) =123936a(16) =139910a(17) =156852a(18) =174762a(19) =193640a(20) =213486a(21) =234300a(22) =256082a(23) =278832a(24) =302550a(25) =327236a(26) =352890a(27) =379512a(28) =407102a(29) =435660