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Number of (n+3)X7 binary arrays with no more than one of any consecutive four bits set in any row or column
1

%I #5 Mar 31 2012 12:36:54

%S 6365,41617,283870,1941572,12958109,86445746,579826944,3901532872,

%T 26198114119,175675221993,1178208385041,7907824387651,53079768577632,

%U 356204915725459,2390083486476288,16038176530380477,107628315946156767

%N Number of (n+3)X7 binary arrays with no more than one of any consecutive four bits set in any row or column

%C Column 4 of A203048

%H R. H. Hardin, <a href="/A203044/b203044.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

%e ..1..0..0..0..0..1..0....0..0..0..0..0..0..1....0..0..1..0..0..0..1

%e ..0..1..0..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..0..0..0

%e ..0..0..0..1..0..0..0....1..0..0..0..1..0..0....0..0..0..0..0..0..0

%e ..0..0..0..0..0..0..0....0..1..0..0..0..0..0....0..0..0..1..0..0..0

%e ..0..0..0..0..0..0..0....0..0..0..0..0..1..0....0..0..0..0..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 27 2011