a(n) = 196*n^2 + 2*n.

Terms

a(0) =198a(1) =788a(2) =1770a(3) =3144a(4) =4910a(5) =7068a(6) =9618a(7) =12560a(8) =15894a(9) =19620a(10) =23738a(11) =28248a(12) =33150a(13) =38444a(14) =44130a(15) =50208a(16) =56678a(17) =63540a(18) =70794a(19) =78440a(20) =86478a(21) =94908a(22) =103730a(23) =112944a(24) =122550a(25) =132548a(26) =142938a(27) =153720a(28) =164894a(29) =176460