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 A291145 #17 Oct 14 2019 21:12:49 %S A291145 0,1,14641,4228599998736,2598836588984899974898904499869498896 %N A291145 a(n) is the smallest fourth power m^4 such that the sum of the digits of m^4 is equal to n^4. %F A291145 a(n) = A286650(n)^4. %Y A291145 Cf. A067072, A067074, A286650. %K A291145 nonn,base %O A291145 0,3 %A A291145 _Seiichi Manyama_, Aug 18 2017