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 A227549 #47 Apr 21 2023 13:31:39 %S A227549 0,1,2,3,4,5,6,7,8,9,357440,357441,357442,357443,357444,357445,357446, %T A227549 357447,357448,357449,1079653,1081713,1122966,1123079,1123080,2246166, %U A227549 3369253,3371313,3412566,4494393,4494400,4535653,5658739,5658740,5660793,5660800 %N A227549 Numbers that contain their base-16 representation in their decimal representation. %H A227549 Roland Kneer and Giovanni Resta, <a href="/A227549/b227549.txt">Table of n, a(n) for n = 1..139</a> (terms < 16^22, first 55 terms from Roland Kneer) %e A227549 357440 = (57440)_16 %e A227549 1079653 = (107965)_16 %e A227549 23132273099720801084801040 = (1322730997208010848010)_16 %t A227549 Select[Range[0,5661000],SequenceCount[IntegerDigits[#],IntegerDigits[#,16]]>0&] (* _Harvey P. Dale_, Apr 21 2023 *) %Y A227549 Subsequence of A102489. %K A227549 nonn,base %O A227549 1,3 %A A227549 _Roland Kneer_, Aug 05 2013