A172763 - OEIS

%I #6 Apr 26 2015 18:46:05

%S 1,580,19546975,11012437532800,53461314050652508000,

%T 1482500191777802616831698000,177485739636656023698217362159890000,

%U 74896615128945574656737417426177604440960000

%N Number of 3*n X n 0..3 arrays with row sums 3 and column sums 9.

%H R. H. Hardin, <a href="/A172763/b172763.txt">Table of n, a(n) for n=1..23</a>

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 06 2010