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 A015382 #12 Sep 08 2022 08:44:39
%S A015382 1,-909090909,918273645463728191,-917356289173636281073462809,
%T A015382 917448033977125729275307703398447191,
%U A015382 -917438859588520669588272049420660231320652809,917439777028298615325746963688293507886210115870347191
%N A015382 Gaussian binomial coefficient [ n,9 ] for q=-10.
%D A015382 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 A015382 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.
%D A015382 M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
%H A015382 Vincenzo Librandi, <a href="/A015382/b015382.txt">Table of n, a(n) for n = 9..120</a>
%F A015382 a(n) = Product_{i=1..9} ((-10)^(n-i+1)-1)/((-10)^i-1). - _Vincenzo Librandi_, Nov 04 2012
%t A015382 Table[QBinomial[n, 9, -10],{n, 9, 20}] (* _Vincenzo Librandi_, Nov 04 2012 *)
%o A015382 (Magma) r:=9; q:=-10; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // _Vincenzo Librandi_, Nov 04 2012
%Y A015382 Cf. Gaussian binomial coefficients [n, 9] for q = -2..-13: A015371, A015375, A015376, A015377, A015378, A015379, A015380, A015381, A015383, A015384, A015385. - _Vincenzo Librandi_, Nov 04 2012
%K A015382 sign,easy
%O A015382 9,2
%A A015382 _Olivier Gérard_