a(n) = 686*n - 14.

Terms

a(0) =672a(1) =1358a(2) =2044a(3) =2730a(4) =3416a(5) =4102a(6) =4788a(7) =5474a(8) =6160a(9) =6846a(10) =7532a(11) =8218a(12) =8904a(13) =9590a(14) =10276a(15) =10962a(16) =11648a(17) =12334a(18) =13020a(19) =13706a(20) =14392a(21) =15078a(22) =15764a(23) =16450a(24) =17136a(25) =17822a(26) =18508a(27) =19194a(28) =19880a(29) =20566