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 A121237 #12 Aug 30 2020 11:49:43
%S A121237 1,257,7625597485244,340282366920938463463374615057365696700,
%T A121237 2350988701644575015937473074444491355637331113544515325384424351020297893524511711399825
%N A121237 Partial sums of n^(n^3).
%t A121237 Accumulate[Table[n^(n^3),{n,5}]] (* _Harvey P. Dale_, Aug 01 2019 *)
%Y A121237 Cf. A245490.
%K A121237 easy,nonn
%O A121237 1,2
%A A121237 _Jonathan Vos Post_, Aug 21 2006