Number of solutions to x^2 + y^2 <= n, excluding (0,0), divided by 4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =2a(4) =3a(5) =5a(6) =5a(7) =5a(8) =6a(9) =7a(10) =9a(11) =9a(12) =9a(13) =11a(14) =11a(15) =11a(16) =12a(17) =14a(18) =15a(19) =15a(20) =17a(21) =17a(22) =17a(23) =17a(24) =17a(25) =20a(26) =22a(27) =22a(28) =22a(29) =24