a(n) = 484*n^2 - 22.

Terms

a(0) =462a(1) =1914a(2) =4334a(3) =7722a(4) =12078a(5) =17402a(6) =23694a(7) =30954a(8) =39182a(9) =48378a(10) =58542a(11) =69674a(12) =81774a(13) =94842a(14) =108878a(15) =123882a(16) =139854a(17) =156794a(18) =174702a(19) =193578a(20) =213422a(21) =234234a(22) =256014a(23) =278762a(24) =302478a(25) =327162a(26) =352814a(27) =379434a(28) =407022a(29) =435578