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 A013893 #24 Jul 14 2025 06:42:01 %S A013893 130321,322687697779,799006685782884121,1978419655660313589123979, %T A013893 4898762930960846817716295277921, %U A013893 12129821994589221844500501021364910179,30034640110980377619945846078500632729311721,74368742344158402044370289529129338200416023056379 %N A013893 a(n) = 19^(5*n + 4). %H A013893 Vincenzo Librandi, <a href="/A013893/b013893.txt">Table of n, a(n) for n = 0..50</a> %H A013893 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A013893 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (2476099). %F A013893 a(n) = 2476099*a(n-1), a(0)=130321. - _Vincenzo Librandi_, May 27 2011 %t A013893 NestList[2476099*# &, 130321, 10] (* _Paolo Xausa_, Jul 14 2025 *) %o A013893 (Magma) [19^(5*n+4): n in [0..10]]; // _Vincenzo Librandi_, May 27 2011 %Y A013893 Cf. A001029. %K A013893 nonn %O A013893 0,1 %A A013893 _N. J. A. Sloane_