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

Terms

a(0) =1a(1) =31a(2) =121a(3) =271a(4) =481a(5) =751a(6) =1081a(7) =1471a(8) =1921a(9) =2431a(10) =3001a(11) =3631a(12) =4321a(13) =5071a(14) =5881a(15) =6751a(16) =7681a(17) =8671a(18) =9721a(19) =10831a(20) =12001a(21) =13231a(22) =14521a(23) =15871a(24) =17281a(25) =18751a(26) =20281a(27) =21871a(28) =23521a(29) =25231