A172860 - OEIS

%I #8 Oct 03 2025 00:38:13

%S 0,2,355,838792,10177326885,502857653609080,84763676021354613990,

%T 42550449824987801797296000,57040154877904164444585301792867,

%U 186651541822247767681950912578484269400

%N Number of n X n 0..5 arrays with row sums 9 and column sums 9.

%H R. H. Hardin, <a href="/A172860/b172860.txt">Table of n, a(n) for n=1..15</a>

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 06 2010