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 A177988 #5 Sep 08 2022 08:45:53 %S A177988 1,7,12,15,16,17,31,32,45,49,56,60,65,71,72,77,80,81 %N A177988 Numbers n such that quartic curve y^2=x^4-n has integral points. %C A177988 Complement to this sequence see A177989. %C A177988 Numbers n such that quartic curve y^2=x^4+n has integral points. see A177986. %o A177988 (Magma) IntegralQuarticPoints([1,0,0,0,-81]); %Y A177988 Cf. A054504, A081121, A177986, A177987, A177988, A177989. %K A177988 nonn %O A177988 1,2 %A A177988 _Artur Jasinski_, May 16 2010