A172921 - OEIS

%I #4 Mar 31 2012 12:35:42

%S 0,0,406,11492512,3178005285051,6245350445865892320,

%T 71187872386623811677450179,3978462276964182243369639664709376,

%U 948836768023263746262225246333504275312592

%N Number of n X n 0..7 arrays with row sums 15 and column sums 15

%H R. H. Hardin, <a href="/A172921/b172921.txt">Table of n, a(n) for n=1..10</a>

%K nonn

%O 1,3

%A _R. H. Hardin_ Feb 06 2010