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 A078519 #7 Jul 03 2025 09:30:36 %S A078519 217519,1390400,5507880,8282543,12552200,7028600,15365639,31669120, %T A078519 42878560,87865617,121952168,108644015,260052385,275156240,606710871, %U A078519 859396455,632671960,1237796960,1553556440 %N A078519 Consider primitive solutions (x,y,z) to x^4+y^4+z^4=w^4 with 0<x<=y<=z arranged in order of increasing w; sequence gives y values. %D A078519 See A003828 for references and links. %Y A078519 Cf. A003828, A078518, A078520. %K A078519 nonn,more %O A078519 1,1 %A A078519 _N. J. A. Sloane_, Jan 07 2003 %E A078519 Data corrected and extended using A003828 by _Sean A. Irvine_, Jul 03 2025