a(n) = 32*n^2 - 40*n + 10.

Terms

a(0) =2a(1) =58a(2) =178a(3) =362a(4) =610a(5) =922a(6) =1298a(7) =1738a(8) =2242a(9) =2810a(10) =3442a(11) =4138a(12) =4898a(13) =5722a(14) =6610a(15) =7562a(16) =8578a(17) =9658a(18) =10802a(19) =12010a(20) =13282a(21) =14618a(22) =16018a(23) =17482a(24) =19010a(25) =20602a(26) =22258a(27) =23978a(28) =25762a(29) =27610