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 A015388 #23 Sep 08 2022 08:44:39
%S A015388 1,44287,2941985410,167517069529030,10015359787639069513,
%T A015388 588973263031690760850991,34826053765400471578213696840,
%U A015388 2055503791013087031667210071738520,121393945396362834176064326157233601646
%N A015388 Gaussian binomial coefficient [ n,10 ] for q=-3.
%D A015388 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 A015388 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.
%D A015388 M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
%H A015388 Vincenzo Librandi, <a href="/A015388/b015388.txt">Table of n, a(n) for n = 10..200</a>
%F A015388 a(n) = Product_{i=1..10} ((-3)^(n-i+1)-1)/((-3)^i-1) (by definition). - _Vincenzo Librandi_, Nov 04 2012
%t A015388 Table[QBinomial[n, 10, -3], {n, 10, 20}] (* _Vincenzo Librandi_, Nov 04 2012 *)
%o A015388 (Sage) [gaussian_binomial(n,10,-3) for n in range(10,18)] # _Zerinvary Lajos_, May 25 2009
%o A015388 (Magma) r:=10; q:=-3; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..25]]; // _Vincenzo Librandi_, Nov 04 2012
%Y A015388 Cf. Gaussian binomial coefficients [n, 10] for q = -2..-13: A015386, A015390, A015391, A015392, A015393, A015394, A015397, A015398, A015399, A015401, A015402.
%K A015388 nonn,easy
%O A015388 10,2
%A A015388 _Olivier Gérard_