a(n) = 22*n^2 + 1.

Terms

a(0) =1a(1) =23a(2) =89a(3) =199a(4) =353a(5) =551a(6) =793a(7) =1079a(8) =1409a(9) =1783a(10) =2201a(11) =2663a(12) =3169a(13) =3719a(14) =4313a(15) =4951a(16) =5633a(17) =6359a(18) =7129a(19) =7943a(20) =8801a(21) =9703a(22) =10649a(23) =11639a(24) =12673a(25) =13751a(26) =14873a(27) =16039a(28) =17249a(29) =18503