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 A160815 #15 Sep 08 2022 08:45:45
%S A160815 1,69,1024,6777,28773,92589,246688,573329,1201633,2322805,4207512,
%T A160815 7225417,11866869,18766749,28730472,42762145,62094881,88223269,
%U A160815 122938000,168362649,226992613,301736205,395957904,513523761,658848961
%N A160815 Expansion of (1+62*x+562*x^2+1023*x^3+458*x^4+49*x^5+x^6)/(1-x)^7.
%C A160815 Source: the De Loera et al. article and the Haws website listed in A160747.
%H A160815 Vincenzo Librandi, <a href="/A160815/b160815.txt">Table of n, a(n) for n = 0..10000</a>
%H A160815 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (7,-21,35,-35,21,-7,1).
%F A160815 a(n) = 539*n^6/180 +151*n^5/15 +335*n^4/18 +19*n^3 +2231*n^2/180 +74*n/15 +1. - _R. J. Mathar_, Sep 11 2011
%t A160815 CoefficientList[Series[(1+62*x+562*x^2+1023*x^3+458*x^4+49*x^5+x^6)/(1-x)^7, {x, 0, 50}], x] (* _G. C. Greubel_, Apr 26 2018 *)
%t A160815 LinearRecurrence[{7,-21,35,-35,21,-7,1},{1,69,1024,6777,28773,92589,246688},30] (* _Harvey P. Dale_, Sep 16 2019 *)
%o A160815 (Magma) [539*n^6/180 +151*n^5/15 +335*n^4/18 +19*n^3 +2231*n^2/180 +74*n/15 +1: n in [0..30]]; // _Vincenzo Librandi_, Sep 18 2011
%o A160815 (PARI) x='x+O('x^30); Vec((1+62*x+562*x^2+1023*x^3+458*x^4+49*x^5 + x^6)/(1-x)^7) \\ _G. C. Greubel_, Apr 26 2018
%K A160815 nonn
%O A160815 0,2
%A A160815 _N. J. A. Sloane_, Nov 18 2009