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 A333902 #8 Apr 20 2020 17:57:08 %S A333902 1,1,2,10,70,566,4781,41357,364470,3257830,29450557,268701797, %T A333902 2470513849,22862694505,212758007450,1989477010250,18682005254390, %U A333902 176085344355510,1665167298000005,15793406377949405,150192477267201945,1431741484334863145,13678227386467491410 %N A333902 Number of nonequivalent 3 X n nonnegative integer matrices with all column sums 3 and row sums n up to permutation of rows. %C A333902 Number of factorizations of m^3 into 3 factors, where m is a product of exactly n distinct primes and each factor is a product of n primes (counted with multiplicity). %H A333902 Andrew Howroyd, <a href="/A333902/b333902.txt">Table of n, a(n) for n = 0..100</a> %e A333902 The a(2) = 2 matrices are: %e A333902 [1 1] [0 2] %e A333902 [1 1] [1 1] %e A333902 [1 1] [2 0] %Y A333902 Row n=3 of A257462. %K A333902 nonn %O A333902 0,3 %A A333902 _Andrew Howroyd_, Apr 18 2020