A172896 - OEIS

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

%S 0,0,55,1624984,604695015651,1519010563560867720,

%T 21289875032822659308693914,1419681395223483661783817488296832,

%U 393979033195135438178790605724141071905152

%N Number of n X n 0..6 arrays with row sums 15 and column sums 15

%H R. H. Hardin, <a href="/A172896/b172896.txt">Table of n, a(n) for n=1..10</a>

%K nonn

%O 1,3

%A _R. H. Hardin_ Feb 06 2010