Square root of squares in A145768 (XOR of squares of the numbers 1..n).

Terms

a(0) =1a(1) =4a(2) =1a(3) =15a(4) =0a(5) =16a(6) =20a(7) =31a(8) =16a(9) =49a(10) =65a(11) =224a(12) =96a(13) =96a(14) =337a(15) =144a(16) =720a(17) =400a(18) =945a(19) =625a(20) =928a(21) =828a(22) =367a(23) =928a(24) =1889a(25) =624a(26) =2609a(27) =3568a(28) =3568a(29) =2064