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 A013773 #19 Sep 08 2022 08:44:38 %S A013773 529,6436343,78310985281,952809757913927,11592836324538749809, %T A013773 141050039560662968926103,1716155831334586342923895201, %U A013773 20880467999847912034355032910567,254052654154149545721997685422868689 %N A013773 a(n) = 23^(3*n + 2). %H A013773 Vincenzo Librandi, <a href="/A013773/b013773.txt">Table of n, a(n) for n = 0..200</a> %H A013773 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A013773 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (12167). %t A013773 23^(3*Range[0,20]+2) (* or *) NestList[12167#&,529,20] (* _Harvey P. Dale_, Nov 22 2021 *) %o A013773 (Magma) [23^(3*n+2): n in [0..10]]; // _Vincenzo Librandi_, Jun 27 2011 %Y A013773 Subsequence of A009967. %K A013773 nonn,easy %O A013773 0,1 %A A013773 _N. J. A. Sloane_