This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A248397 #18 Oct 13 2019 04:18:11 %S A248397 1,3,33,51,57,59,83,139,177,187,209,211,267,321,339,345,379,385,411, %T A248397 451,489,499,515,555,587,595,649,659,665,681,707,803,811,827,835,899, %U A248397 921,969,1001,1059,1099,1137,1171,1211,1219,1235,1259,1267,1281,1315,1329,1363 %N A248397 Noncongruent squarefree numbers n with A248394(n)/d(n) = 1, where d(n) = A000005(n). %H A248397 J. B. Tunnell, <a href="http://dx.doi.org/10.1007/BF01389327">A classical Diophantine problem and modular forms of weight 3/2</a>, Invent. Math., 72 (1983), 323-334. %Y A248397 Cf. A000005, A003273, A165564, A248394, A248395, A248397-A248407. %K A248397 nonn %O A248397 1,2 %A A248397 _N. J. A. Sloane_, Oct 20 2014 %E A248397 More terms from _Amiram Eldar_, Oct 13 2019