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 A001740 #17 Feb 03 2022 22:50:41
%S A001740 0,1,4,14,31,100,121,144,224,311,400,441,1034,1134,1241,1400,2011,
%T A001740 2124,2244,2421,3100,3231,3414,4104,4301,10000,10201,10404,11114,
%U A001740 11331,12100,12321,13044,13324,14111,14400,20141,20434,21234,22041,22400,23211,24024
%N A001740 Squares written in base 5.
%H A001740 T. D. Noe, <a href="/A001740/b001740.txt">Table of n, a(n) for n = 0..1000</a>
%F A001740 a(n) = A007091(A000290(n)). - _Jason Kimberley_, Dec 13 2012
%t A001740 Table[FromDigits[IntegerDigits[n^2, 5]], {n, 0, 50}] (* _T. D. Noe_, Aug 10 2012 *)
%K A001740 base,easy,nonn
%O A001740 0,3
%A A001740 _N. J. A. Sloane_