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 A173041 #16 Jun 30 2023 15:11:29
%S A173041 5,23,203,2003,20003,200003,2000003,20000003,200000003,2000000003,
%T A173041 20000000003,200000000003,2000000000003,20000000000003,
%U A173041 200000000000003,2000000000000003,20000000000000003,200000000000000003
%N A173041 a(n) = 2*10^n + 3.
%H A173041 Vincenzo Librandi, <a href="/A173041/b173041.txt">Table of n, a(n) for n = 0..200</a>
%H A173041 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (11, -10).
%F A173041 G.f.: (5-32*x)/((1-x)*(1-10*x)). - _Vincenzo Librandi_, Apr 05 2013
%t A173041 CoefficientList[Series[(5 - 32 x)/((1 - x) (1 - 10 x)), {x, 0, 20}], x] (* _Vincenzo Librandi_, Apr 05 2013 *)
%t A173041 Table[2*10^n+3,{n,0,20}] (* _Harvey P. Dale_, Jun 01 2019 *)
%o A173041 (Magma) [2*10^n + 3: n in [0..20]]; // _Vincenzo Librandi_, Apr 05 2013
%Y A173041 Cf. A081677 (numbers n such that 2*10^n + 3 is prime), A101951 (numbers n such that 20*10^n + 3 is prime). - _Klaus Brockhaus_, Feb 28 2010
%K A173041 nonn,easy
%O A173041 0,1
%A A173041 _Vincenzo Librandi_, Feb 08 2010