A202570 - OEIS

%I #5 Mar 31 2012 12:36:49

%S 3525903,116710359,3960376543,133595643125,4416423552899,

%T 146521400746907,4884856784343255,162753806260330153,

%U 5417559503164734667,180285965744987292345,6002130815063113162999,199829570019880146647609

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

%C Column 4 of A202574

%H R. H. Hardin, <a href="/A202570/b202570.txt">Table of n, a(n) for n = 1..50</a>

%e Some solutions for n=2

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 21 2011