A207220 - OEIS

%I #5 Mar 31 2012 12:37:16

%S 1465,2146225,1950327875,1721695415743,1547869995556777,

%T 1395037573042216457,1256433426475190769775,1131415114956594837875523,

%U 1018866149319377364919603291,917523154945563563526500635865

%N Number of nX7 0..2 arrays avoiding the pattern z z+1 z in any row or column

%C Column 7 of A207221

%H R. H. Hardin, <a href="/A207220/b207220.txt">Table of n, a(n) for n = 1..36</a>

%e Some solutions for n=4

%e ..0..0..2..1..2..0..1....2..2..1..0..0..1..2....0..1..2..2..1..0..1

%e ..2..0..2..2..0..2..2....1..0..1..1..0..2..2....0..1..1..0..0..0..0

%e ..0..1..2..2..2..1..2....0..0..0..1..1..2..2....0..0..2..2..2..2..1

%e ..1..1..2..2..1..1..2....1..1..2..0..2..2..0....0..2..0..1..2..2..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 16 2012