Numbers that are the sum of 2 squares.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =8a(6) =9a(7) =10a(8) =13a(9) =16a(10) =17a(11) =18a(12) =20a(13) =25a(14) =26a(15) =29a(16) =32a(17) =34a(18) =36a(19) =37a(20) =40a(21) =41a(22) =45a(23) =49a(24) =50a(25) =52a(26) =53a(27) =58a(28) =61a(29) =64