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 A015203 #19 May 14 2019 11:10:22
%S A015203 1,2,18,484,61700,24625416,46902626632,280592659752848,
%T A015203 8014314610618754064,719144325473017534005280,
%U A015203 308098615000966585021543006496,414695472396278556489315958364507712,2664978629760569684020787743089224873508928
%N A015203 Sum of Gaussian binomial coefficients for q=15.
%D A015203 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 A015203 I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p. 99.
%D A015203 M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
%H A015203 Vincenzo Librandi, <a href="/A015203/b015203.txt">Table of n, a(n) for n = 0..50</a>
%H A015203 Kent E. Morrison, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL9/Morrison/morrison37.html">Integer Sequences and Matrices Over Finite Fields</a>, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.1.
%F A015203 a(0) = 1, a(1) = 2, a(n) = 2*a(n-1) + a(n-2)*((15^(n-1)) - 1). - _Vincenzo Librandi_, Nov 02 2012
%t A015203 Total/@Table[QBinomial[n, m, 15], {n, 0, 20}, {m, 0, n}] (* _Vincenzo Librandi_, Nov 02 2012 *)
%Y A015203 Row sums of triangle A022179.
%K A015203 nonn
%O A015203 0,2
%A A015203 _N. J. A. Sloane_, _Olivier Gérard_