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 A248405 #12 Oct 13 2019 04:17:34 %S A248405 82,282,562,626,818,914,1042,1106,1138,1202,1426,1442,1578,1618,1778, %T A248405 1802,1874,2114,2258,2338,2410,2482,2506,2562,2642,2674,2714,2866, %U A248405 2874,2938,2954,3322,3498,3506,3602,3810,4314,4354,4458,4562,4826,4930,5026,5258,5322 %N A248405 Noncongruent squarefree numbers n with A248395(n)/d(n) = 2, where d(n) = A000005(n). %H A248405 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 A248405 Cf. A000005, A003273, A248394, A248395, A248397-A248406. %K A248405 nonn %O A248405 1,1 %A A248405 _N. J. A. Sloane_, Oct 20 2014 %E A248405 More terms from _Amiram Eldar_, Oct 13 2019