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 A013888 #19 Jan 27 2023 19:20:55 %S A013888 5832,11019960576,20822964865671168,39346408075296537575424, %T A013888 74347713614021927913318776832,140485060518220186283313934500888576, %U A013888 265456074833292280954988944586975024775168,501597304410594428739556550045321223614364647424 %N A013888 a(n) = 18^(5*n + 3). %H A013888 Vincenzo Librandi, <a href="/A013888/b013888.txt">Table of n, a(n) for n = 0..50</a> %H A013888 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A013888 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1889568). %F A013888 a(n) = 1889568*a(n-1), a(0)=5832. - _Vincenzo Librandi_, May 27 2011 %t A013888 18^(5Range[0,20]+3) (* or *) NestList[1889568#&,5832,20] (* _Harvey P. Dale_, Jan 27 2023 *) %o A013888 (Magma) [18^(5*n+3): n in [0..10]]; // _Vincenzo Librandi_, May 27 2011 %Y A013888 Cf. A001027. %K A013888 nonn %O A013888 0,1 %A A013888 _N. J. A. Sloane_