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 A009973 #52 Jul 12 2023 12:37:46 %S A009973 1,29,841,24389,707281,20511149,594823321,17249876309,500246412961, %T A009973 14507145975869,420707233300201,12200509765705829,353814783205469041, %U A009973 10260628712958602189,297558232675799463481,8629188747598184440949 %N A009973 Powers of 29. %C A009973 Same as Pisot sequences E(1, 29), L(1, 29), P(1, 29), T(1, 29). Essentially same as Pisot sequences E(29, 841), L(29, 841), P(29, 841), T(29, 841). See A008776 for definitions of Pisot sequences. %C A009973 The compositions of n in which each natural number is colored by one of p different colors are called p-colored compositions of n. For n>=1, a(n) equals the number of 29-colored compositions of n such that no adjacent parts have the same color. - _Milan Janjic_, Nov 17 2011 %C A009973 Numbers n such that sigma(29*n) = 29*n + sigma(n). - _Jahangeer Kholdi_, Nov 23 2013 %H A009973 T. D. Noe, <a href="/A009973/b009973.txt">Table of n, a(n) for n = 0..100</a> %H A009973 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A009973 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (29). %F A009973 G.f.: 1/(1-29*x). - _Philippe Deléham_, Nov 24 2008 %F A009973 a(n) = 29^n; a(n) = 29*a(n-1) for n>0, a(0)=1. - _Vincenzo Librandi_, Nov 21 2010 %F A009973 G.f.: (G(0)-2)/(9*x), where G(k)= 1 + 1/(1 - x*(9*k-9)/(x*(9*k+20) - 2/G(k+1))); (continued fraction). - _Sergei N. Gladkovskii_, Jun 17 2013 %p A009973 A009973:=n->29^n; seq(A009973(n), n=0..20); # _Wesley Ivan Hurt_, Jun 06 2014 %t A009973 29^Range[0,20] (* _Harvey P. Dale_, Jul 19 2011 *) %o A009973 (Sage) [29^n for n in (1..17)] # _Zerinvary Lajos_, Apr 29 2009 %o A009973 (Magma) [29^n: n in [0..30]]; // _Vincenzo Librandi_, Nov 21 2010 %o A009973 (Maxima) makelist(29^n, n, 0, 30); /* _Martin Ettl_, Nov 07 2012 */ %o A009973 (PARI) a(n)=29^n \\ _Charles R Greathouse IV_, Sep 24 2015 %K A009973 nonn,easy %O A009973 0,2 %A A009973 _N. J. A. Sloane_, Dec 11 1996