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 A015413 #18 Sep 08 2022 08:44:39
%S A015413 1,-7635497415,66629509457629850745,-571227449525600988055816521095,
%T A015413 4908004671908135948969747939905903872633,
%U A015413 -42158152544207284340561914581652169948472972883335
%N A015413 Gaussian binomial coefficient [ n,11 ] for q=-8.
%D A015413 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 A015413 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.
%D A015413 M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
%H A015413 Vincenzo Librandi, <a href="/A015413/b015413.txt">Table of n, a(n) for n = 11..110</a>
%F A015413 a(n) = Product_{i=1..11} ((-8)^(n-i+1)-1)/((-8)^i-1) (by definition). - _Vincenzo Librandi_, Nov 06 2012
%t A015413 Table[QBinomial[n, 11, -8], {n, 11, 20}] (* _Vincenzo Librandi_, Nov 06 2012 *)
%o A015413 (Sage) [gaussian_binomial(n,11,-8) for n in range(11,17)] # _Zerinvary Lajos_, May 28 2009
%o A015413 (Magma) r:=11; q:=-8; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // _Vincenzo Librandi_, Nov 06 2012
%K A015413 sign,easy
%O A015413 11,2
%A A015413 _Olivier Gérard_