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%I A172645 #8 Feb 03 2021 21:40:45
%S A172645 1,3,31,2371,1084851,3680774301,91358224634433,17470072106054582211,
%T A172645 26088526624958727703324771,310419652143758898175543447421953,
%U A172645 29785621316391113552729016416250323294253
%N A172645 Number of n X n 0..2 arrays with row sums n and column sums n.
%H A172645 R. H. Hardin, <a href="/A172645/b172645.txt">Table of n, a(n) for n=1..14</a>
%Y A172645 Main diagonal of A334549.
%K A172645 nonn
%O A172645 1,2
%A A172645 _R. H. Hardin_, Feb 06 2010

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