a(n) = 64*n^2 + 1.

Terms

a(0) =1a(1) =65a(2) =257a(3) =577a(4) =1025a(5) =1601a(6) =2305a(7) =3137a(8) =4097a(9) =5185a(10) =6401a(11) =7745a(12) =9217a(13) =10817a(14) =12545a(15) =14401a(16) =16385a(17) =18497a(18) =20737a(19) =23105a(20) =25601a(21) =28225a(22) =30977a(23) =33857a(24) =36865a(25) =40001a(26) =43265a(27) =46657a(28) =50177a(29) =53825