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

Terms

a(0) =194a(1) =780a(2) =1758a(3) =3128a(4) =4890a(5) =7044a(6) =9590a(7) =12528a(8) =15858a(9) =19580a(10) =23694a(11) =28200a(12) =33098a(13) =38388a(14) =44070a(15) =50144a(16) =56610a(17) =63468a(18) =70718a(19) =78360a(20) =86394a(21) =94820a(22) =103638a(23) =112848a(24) =122450a(25) =132444a(26) =142830a(27) =153608a(28) =164778a(29) =176340