Numerator of squared radius of smallest circle passing through exactly n integral points.

Terms

a(0) =1a(1) =25a(2) =1a(3) =625a(4) =25a(5) =138125a(6) =5a(7) =4225a(8) =625a(9) =801125a(10) =25a(11) =1221025a(12) =15625a(13) =105625a(14) =65a(15) =185870425a(16) =4225a(17) =185870425a(18) =625a(19) =29641625a(20) =29641625a(21) =30525625a(22) =325a(23) =17850625a(24) =35409725a(25) =1221025a(26) =15625a(27) =3159797225a(28) =105625a(29) =763140625