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 A015345 #20 Sep 08 2022 08:44:39
%S A015345 1,-239945,69088371619,-19251196169490725,5393264335151280477835,
%T A015345 -1509574711680960125598763925,422593364163884169440003098013995,
%U A015345 -118298673397216914972187267242547690325,33116077152651051199781730118147946460139435
%N A015345 Gaussian binomial coefficient [ n,7 ] for q = -6.
%D A015345 J. Goldman and G.-C. Rota, The number of subspaces of a vector space, pp. 75-83 of W. T. Tutte, editor, Recent Progress in Combinatorics. Academic Press, NY, 1969.
%D A015345 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.
%D A015345 M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
%H A015345 Vincenzo Librandi, <a href="/A015345/b015345.txt">Table of n, a(n) for n = 7..190</a>
%H A015345 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (-239945,11514768594,89124308917560,-115609163009731776,-24949102541146076160,902345215627683201024,5263661621405464657920,-6140942214464815497216)
%F A015345 G.f.: x^7 / ( (x-1)*(279936*x+1)*(216*x+1)*(36*x-1)*(7776*x+1)*(1296*x-1)*(6*x+1)*(46656*x-1) ). - _R. J. Mathar_, Sep 02 2016
%t A015345 Table[QBinomial[n, 7, -6], {n, 7, 20}] (* _Vincenzo Librandi_, Nov 02 2012 *)
%o A015345 (Sage) [gaussian_binomial(n,7,-6) for n in range(7,15)] # _Zerinvary Lajos_, May 27 2009
%o A015345 (Magma) r:=7; q:=-6; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..15]]; // _Vincenzo Librandi_, Nov 02 2012
%K A015345 sign,easy
%O A015345 7,2
%A A015345 _Olivier Gérard_, Dec 11 1999