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 A160863 #21 Sep 08 2022 08:45:45
%S A160863 1,154,2199,13911,57209,179988,471675,1082509,2246545,4308382,7753615,
%T A160863 13243011,21650409,34104344,52033395,77215257,111829537,158514274,
%U A160863 220426183,301304623,405539289,538241628,705319979,913558437,1170699441
%N A160863 Expansion of (1+147*x+1142*x^2+1717*x^3+656*x^4+60*x^5+x^6)/(1-x)^7.
%C A160863 Source: the De Loera et al. article and the Haws website listed in A160747.
%H A160863 Vincenzo Librandi, <a href="/A160863/b160863.txt">Table of n, a(n) for n = 0..10000</a>
%H A160863 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (7,-21,35,-35,21,-7,1).
%F A160863 a(n) = 931*n^6/180 +1261*n^5/60 +1547*n^4/36 +565*n^3/12 +1276*n^2/45 +42*n/5 +1. - _R. J. Mathar_, Sep 17 2011
%p A160863 seq(coeff(series((1+147*x+1142*x^2+1717*x^3+656*x^4+60*x^5+x^6)/(1-x)^7, x,n+1),x,n),n=0..25); # _Muniru A Asiru_, Apr 29 2018
%t A160863 LinearRecurrence[{7,-21,35,-35,21,-7,1}, {1, 154, 2199, 13911, 57209, 179988, 471675}, 30] (* _G. C. Greubel_, Apr 28 2018 *)
%o A160863 (Magma) [931*n^6/180 +1261*n^5/60 +1547*n^4/36 +565*n^3/12 +1276*n^2/45 +42*n/5+1: n in [0..30]]; // _Vincenzo Librandi_, Sep 20 2011
%o A160863 (PARI) x='x+O('x^30); Vec((1+147*x+1142*x^2+1717*x^3+656*x^4+60*x^5+ x^6)/(1-x)^7) \\ _G. C. Greubel_, Apr 28 2018
%K A160863 nonn,easy
%O A160863 0,2
%A A160863 _N. J. A. Sloane_, Nov 18 2009