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 A306783 #14 Mar 09 2019 20:24:47
%S A306783 3,25,532,58693
%N A306783 Number of distinct minimal polynomials of n X n matrices with elements {0, 1, 2}.
%H A306783 S. E. Thornton, <a href="http://www.bohemianmatrices.com/cpdb/unstructured/unstructured_0_1_2">Properties of the Bohemian family of n x n matrices with population {0, 1, 2}</a>, Characteristic Polynomial Database.
%Y A306783 Number of characteristic polynomials is in A272659.
%K A306783 nonn,more,hard
%O A306783 1,1
%A A306783 _Steven E. Thornton_, Mar 09 2019