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 A124475 #9 Jan 15 2025 12:14:59 %S A124475 1,9,9,12,41,3,37,21,23,3,3,1,39,3,39,41,43,81,3,3,47,31,101,43,39,33, %T A124475 149,43,23,9,1,131,103,41,7,123,21,147,9,417,29,277,11,117,337,51,71, %U A124475 93,21,187,81,69,111,59,217,183,179,403,249,33,29,153,231,141,7,117,93,329,223,393 %N A124475 a(n) = 10*A124262(n) - A124262(n+1). %Y A124475 Cf. A124262. %K A124475 nonn %O A124475 1,2 %A A124475 _Artur Jasinski_, Dec 17 2006