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 A043362 #7 Mar 24 2021 18:23:30 %S A043362 18,43,68,78,83,88,90,91,92,94,98,118,143,168,193,203,208,213 %N A043362 Duplicate of A023735. %t A043362 Select[Range[200],DigitCount[#,5,3]==1&] (* _Harvey P. Dale_, Mar 24 2021 *) %K A043362 dead %O A043362 1,1 %A A043362 _Harvey P. Dale_, Mar 24 2021