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 A051441 #6 Mar 06 2020 00:05:58 %S A051441 262144,542101086242752217003726400434970855712890625,7776,7 %N A051441 4^3^2^1, 5^4^3, 6^5, 7. %Y A051441 Cf. A027747. %K A051441 nonn,easy,fini,full %O A051441 0,1 %A A051441 _N. J. A. Sloane_