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 A248407 #12 Oct 13 2019 04:15:47 %S A248407 1,2,3,10,11,17,19,26,33,35,42,43,51,57,58,59,66,67,73,74,82,83,89,91, %T A248407 97,105,106,107,113,114,115,122,123,129,130,131,139,146,155,163,170, %U A248407 177,178,179,185,186,187,193,195,201,202,203,209 %N A248407 Squarefree noncongruent numbers. %H A248407 Amiram Eldar, <a href="/A248407/b248407.txt">Table of n, a(n) for n = 1..2580</a> (terms below 10^4) %H A248407 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 A248407 Intersection of A005117 and A165564. %Y A248407 Cf. A003273, A248394, A248395, A248397-A248406. %K A248407 nonn %O A248407 1,2 %A A248407 _N. J. A. Sloane_, Oct 20 2014