%I
%S 1,0,0,1,1,22,550,16700,703297,38135272,2584332084,214050246975,
%T 21269928579625,2497135296996934,341930210261762434,
%U 54008226638062039798,9746833030828647070625,1993080976749664740373600,458405276998431265342151848,117814680468332544208002721773
%N Number of nonequivalent n X n binary matrices with 3 ones in every row and column up to permutation of rows.
%C Number of factorizations of m^3 into n factors, where m is a product of exactly n distinct primes and each factor is a product of 3 distinct primes.
%H Andrew Howroyd, <a href="/A333899/b333899.txt">Table of n, a(n) for n = 0..100</a>
%Y Column k=3 of A260340.
%Y Cf. A254243.
%K nonn
%O 0,6
%A _Andrew Howroyd_, Apr 18 2020
