Numbers that are the sum of 4 nonzero squares in exactly 1 way.

Terms

a(0) =4a(1) =7a(2) =10a(3) =12a(4) =13a(5) =15a(6) =16a(7) =18a(8) =19a(9) =20a(10) =21a(11) =22a(12) =23a(13) =25a(14) =26a(15) =27a(16) =30a(17) =33a(18) =35a(19) =38a(20) =40a(21) =44a(22) =46a(23) =48a(24) =51a(25) =53a(26) =59a(27) =62a(28) =64a(29) =65