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 A033836 #13 Dec 11 2021 04:35:36 %S A033836 2,0,8,83,32,922,128,7330,512,0,2048,1075174,8192,0,32768,86486662, %T A033836 131072,776413846,524288,0,2097152,0,8388608,0,33554432,0,134217728, %U A033836 183016755558795,536870912,1029465324149666,2147483648 %N A033836 Smallest number > 1 equal to sum of n-th powers of its base-4 digits, or 0 if no such number exists (written in base 10). %H A033836 Joseph Myers, <a href="/A033836/b033836.txt">Table of n, a(n) for n = 1..1887</a> %Y A033836 Cf. A162219, A162220, A162221. In other bases: A033835 (base 3), A033837 (base 5), A033838 (base 6), A033839 (base 7), A033840 (base 8), A033841 (base 9), A003321 (base 10). - _Joseph Myers_, Jul 07 2009 %K A033836 nonn,base %O A033836 1,1 %A A033836 _David W. Wilson_