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 A033837 #13 Dec 11 2021 04:35:24 %S A033837 2,13,28,289,308,4890,257,66562,322217,0,0,0,16387,268533762, %T A033837 2204944815,172449032,34876823313,207708636457,0,3315971951065, %U A033837 8837942823632,53027623387338,422589088112942,1129785254793 %N A033837 Smallest number > 1 equal to sum of n-th powers of its base-5 digits, or 0 if no such number exists (written in base 10). %H A033837 Joseph Myers, <a href="/A033837/b033837.txt">Table of n, a(n) for n = 1..809</a> %Y A033837 Cf. A162222, A162223, A162224. In other bases: A033835 (base 3), A033836 (base 4), A033838 (base 6), A033839 (base 7), A033840 (base 8), A033841 (base 9), A003321 (base 10). - _Joseph Myers_, Jul 07 2009 %K A033837 nonn,base %O A033837 1,1 %A A033837 _David W. Wilson_