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 A245171 #8 Feb 12 2019 09:15:22
%S A245171 1,0,1,0,3,8,3,0,1,8,15,8,1,0,1,16,70,112,70,16,1,0,3,80,630,2016,
%T A245171 2940,2016,630,80,3,0,1,40,495,2640,6930,9504,6930,2640,495,40,1
%N A245171 Triangle read by rows: coefficients of the polynomials A_{2,4}(n,k).
%H A245171 J. Agapito, <a href="https://dx.doi.org/10.1016/j.laa.2014.03.018">On symmetric polynomials with only real zeros and nonnegative gamma-vectors</a>, Linear Algebra and its Applications, Volume 451, 15 June 2014, Pages 260-289.
%e A245171 Triangle begins:
%e A245171 1,
%e A245171 0,1,
%e A245171 0,3,8,3,
%e A245171 0,1,8,15,8,1,
%e A245171 0,1,16,70,112,70,16,1,
%e A245171 0,3,80,630,2016,2940,2016,630,80,3,
%e A245171 0,1,40,495,2640,6930,9504,6930,2640,495,40,1,
%e A245171 ...
%Y A245171 Cf. A245167, A245168, A245169, A245170, A245172, A245173.
%K A245171 nonn,tabf,more
%O A245171 0,5
%A A245171 _N. J. A. Sloane_, Jul 13 2014