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 A045187 #19 May 21 2023 00:21:48 %S A045187 6262,6302,6310,6502,6510,6550,7502,7510,7550,7750,15687,15887,15927, %T A045187 15935,16887,16927,16935,17127,17135,17175,21887,21927,21935,22127, %U A045187 22135,22175,23127,23135,23175,23375,31287,31307 %N A045187 Numbers whose base-5 representation contains exactly three 0's and three 2's. %H A045187 Vincenzo Librandi, <a href="/A045187/b045187.txt">Table of n, a(n) for n = 1..2000</a> %e A045187 6262_10 = 200022_5. %t A045187 Select[Range[35000],DigitCount[#,5,0]==DigitCount[#,5,2]==3&] (* _Harvey P. Dale_, Jul 23 2014 *) %Y A045187 Cf. A007091. %K A045187 nonn,base %O A045187 1,1 %A A045187 _Clark Kimberling_