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 A306793 #8 Mar 11 2019 04:11:18
%S A306793 2,6,28,370,13403,1535679
%N A306793 Number of distinct real eigenvalues of n X n matrices with elements {0, 1}.
%H A306793 S. E. Thornton, <a href="http://www.bohemianmatrices.com/cpdb/unstructured/unstructured_0_1">Properties of the Bohemian family of n x n matrices with population {0, 1}</a>, Characteristic Polynomial Database.
%Y A306793 Number of distinct eigenvalues is in A306784.
%Y A306793 Number of characteristic polynomials is in A272661.
%Y A306793 Number of minimal polynomials is in A306781.
%K A306793 nonn,more,hard
%O A306793 1,1
%A A306793 _Steven E. Thornton_, Mar 10 2019