a(n) = 196*n^2 - 14.

Terms

a(0) =182a(1) =770a(2) =1750a(3) =3122a(4) =4886a(5) =7042a(6) =9590a(7) =12530a(8) =15862a(9) =19586a(10) =23702a(11) =28210a(12) =33110a(13) =38402a(14) =44086a(15) =50162a(16) =56630a(17) =63490a(18) =70742a(19) =78386a(20) =86422a(21) =94850a(22) =103670a(23) =112882a(24) =122486a(25) =132482a(26) =142870a(27) =153650a(28) =164822a(29) =176386