a(n) = 30*n^2 - 1.

Terms

a(0) =29a(1) =119a(2) =269a(3) =479a(4) =749a(5) =1079a(6) =1469a(7) =1919a(8) =2429a(9) =2999a(10) =3629a(11) =4319a(12) =5069a(13) =5879a(14) =6749a(15) =7679a(16) =8669a(17) =9719a(18) =10829a(19) =11999a(20) =13229a(21) =14519a(22) =15869a(23) =17279a(24) =18749a(25) =20279a(26) =21869a(27) =23519a(28) =25229a(29) =26999