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 A043524 #14 Apr 24 2021 21:27:35 %S A043524 8888,18888,28888,38888,48888,58888,68888,78888,80888,81888,82888, %T A043524 83888,84888,85888,86888,87888,88088,88188,88288,88388,88488,88588, %U A043524 88688,88788,88808,88818,88828,88838,88848,88858,88868 %N A043524 Numbers having four 8's in base 10. %H A043524 Daniel Starodubtsev, <a href="/A043524/b043524.txt">Table of n, a(n) for n = 1..10000</a> %t A043524 Select[Range[100000],DigitCount[#,10,8]==4&] (* _Harvey P. Dale_, Oct 17 2019 *) %Y A043524 Subsequence of A011538. %K A043524 nonn,base %O A043524 1,1 %A A043524 _Clark Kimberling_