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 A123657 #24 Sep 08 2022 08:45:28
%S A123657 4,593,20494,266497,1969376,10125649,40473658,134483969,387958492,
%T A123657 1001010001,2359733894,5162787073,10609354744,20668614737,38454800626,
%U A123657 68736319489,118612097588,198393407569,322734873982,512064160001
%N A123657 a(n) = 1 + n^4 + n^6 + n^9.
%H A123657 G. C. Greubel, <a href="/A123657/b123657.txt">Table of n, a(n) for n = 1..1000</a>
%H A123657 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (10,-45,120,-210,252,-210,120,-45,10,-1).
%F A123657 a(n) = 1 + n^4 + n^6 + n^9 = 1001010001 (base n).
%F A123657 G.f.: -x*(x^9 -8*x^8 -406*x^7 -14592*x^6 -88496*x^5 -156316*x^4 -87762*x^3 -14744*x^2 -553*x -4)/(x-1)^10. - _Colin Barker_, May 27 2012
%t A123657 Table[1 + n^4 + n^6 + n^9, {n, 1, 50}] (* _G. C. Greubel_, Oct 17 2017 *)
%o A123657 (PARI) a(n)=n^9+n^6+n^4+1 \\ _Charles R Greathouse IV_, Oct 16 2015
%o A123657 (Magma) [1 + n^4 + n^6 + n^9: n in [1..25]]; // _G. C. Greubel_, Oct 17 2017
%Y A123657 Cf. A001358, A002523, A091940, A123177, A123656-A123659.
%K A123657 easy,nonn
%O A123657 1,1
%A A123657 _Jonathan Vos Post_, Oct 04 2006