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 A248406 #10 Oct 13 2019 04:17:37 %S A248406 146,178,274,322,466,938,994,1002,1234,1394,1498,1714,1866,1906,2066, %T A248406 2098,2162,2194,2386,2578,2586,2786,2794,2962,3002,3034,3218,3266, %U A248406 3346,3658,3682,3914,3986,4090,4130,4594,4738,4786,4946,5170,5210,5234,5266,5402,5458 %N A248406 Noncongruent squarefree numbers n with A248395(n)/d(n) = -2, where d(n) = A000005(n). %H A248406 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 A248406 Cf. A000005, A003273, A248394, A248395, A248397-A248406. %K A248406 nonn %O A248406 1,1 %A A248406 _N. J. A. Sloane_, Oct 20 2014 %E A248406 More terms from _Amiram Eldar_, Oct 13 2019