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 A245172 #9 Feb 12 2019 09:15:34
%S A245172 1,0,1,0,2,5,2,0,28,200,363,200,28,0,77,1056,4263,6650,4263,1056,77,0,
%T A245172 1001,22088,154739,464126,662927,464126,154739,22088,1001,0,1768,
%U A245172 56729,605607,2933823,7292331,9825279,7292331,2933823,605607,56729,1768
%N A245172 Triangle read by rows: coefficients of the polynomials A_{2,5}(n,k).
%H A245172 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 A245172 Triangle begins:
%e A245172 1,
%e A245172 0,1,
%e A245172 0,2,5,2,
%e A245172 0,28,200,363,200,28,
%e A245172 0,77,1056,4263,6650,4263,1056,77,
%e A245172 0,1001,22088,154739,464126,662927,464126,154739,22088,1001,
%e A245172 0,1768,56729,605607,2933823,7292331,9825279,7292331,2933823,605607,56729,1768,
%e A245172 ...
%Y A245172 Cf. A245167, A245168, A245169, A245170, A245171, A245173.
%K A245172 nonn,tabf,more
%O A245172 0,5
%A A245172 _N. J. A. Sloane_, Jul 13 2014