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 A113443 #9 Jul 08 2024 21:33:31
%S A113443 1,5,23,101,436,1871,8014,34309,146868,628708,2691401,11521603,
%T A113443 49323052,211148530,903912916,3869592721,16565477544,70915744968,
%U A113443 303585747088,1299631069856,5563637060865,23817572559345,101961496787621
%N A113443 Fourth row of A113439.
%H A113443 G. C. Greubel, <a href="/A113443/b113443.txt">Table of n, a(n) for n = 0..1000</a>
%H A113443 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (9,-28,38,-20,1).
%F A113443 a(n) = A113439(4*n+3).
%F A113443 a(n) = 9*a(n-1) - 28*a(n-2) + 38*a(n-3) - 20*a(n-4) + a(n-5).
%F A113443 G.f.: -(1-4*x+6*x^2-4*x^3+x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5).
%t A113443 CoefficientList[Series[-(1 - 4*x + 6*x^2 - 4*x^3 + x^4)/(-1 + 9*x - 28*x^2 + 38*x^3 - 20*x^4 + x^5), {x,0,50}], x] (* _G. C. Greubel_, Mar 11 2017 *)
%o A113443 (PARI) x='x+O('x^50); Vec(-(1-4*x+6*x^2-4*x^3+x^4)/(-1+9*x-28*x^2 +38*x^3 -20*x^4+x^5)) \\ _G. C. Greubel_, Mar 11 2017
%Y A113443 Cf. A113439.
%K A113443 nonn,easy
%O A113443 0,2
%A A113443 _Floor van Lamoen_, Nov 04 2005