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 A331718 #6 Feb 07 2020 20:49:35 %S A331718 1,0,0,3,23,191,2203,31313 %N A331718 Number of nonequivalent n-column binary matrices with 3 ones in every column and any number of distinct nonzero rows up to permutation of rows and columns. %e A331718 The a(3) = 3 matrices are: %e A331718 [1, 1, 0] [1, 1, 1] [1, 1, 1] %e A331718 [1, 0, 1] [1, 1, 0] [1, 1, 0] %e A331718 [1, 0, 0] [1, 0, 1] [1, 0, 1] %e A331718 [0, 1, 1] [0, 1, 0] [0, 1, 1] %e A331718 [0, 1, 0] [0, 0, 1] %e A331718 [0, 0, 1] %Y A331718 Row n=3 of A331510. %Y A331718 Cf. A331717. %K A331718 nonn,more %O A331718 0,4 %A A331718 _Andrew Howroyd_, Feb 02 2020