A172690 - OEIS

%I #4 Mar 31 2012 12:35:40

%S 0,252,98984058271,2556622439429326953984,

%T 1840612120873072393197860408401920,

%U 20856759061804812713740241716791439872159072000

%N Number of 5*n X n 0..2 arrays with row sums 3 and column sums 15

%H R. H. Hardin, <a href="/A172690/b172690.txt">Table of n, a(n) for n=1..13</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 06 2010