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 A027097 #9 Mar 08 2023 11:46:48 %S A027097 1,1,5,17,57,193,653,2206,7431,24920,83099,275334,906103,2961539, %T A027097 9614823,31014965,99440907,317028068,1005424803,3173208229,9970459645, %U A027097 31200384655,97270715153,302217221275,936046187573,2890888534252 %N A027097 a(n) = A027082(n, 2n-10). %Y A027097 Cf. A027082. %K A027097 nonn %O A027097 5,3 %A A027097 _Clark Kimberling_