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A172561 Number of 3*n X n 0..1 arrays with row sums 5 and column sums 15 1

%I

%S 0,0,0,0,1,137225088000,452489654840076972518400,

%T 5638345005774311804302107347272704000,

%U 289360589460480315988823313632867603848637000544000

%N Number of 3*n X n 0..1 arrays with row sums 5 and column sums 15

%H R. H. Hardin, <a href="/A172561/b172561.txt">Table of n, a(n) for n=1..14</a>

%K nonn

%O 1,6

%A _R. H. Hardin_ Feb 06 2010

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Last modified April 4 21:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)