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Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors
1

%I #5 Mar 31 2012 12:37:23

%S 365,147712,64398564,28608436530,12768454002596,5705351522369620,

%T 2550050797214882163,1139842898451065324460,509504876709198501073884,

%U 227747392766431290996397763,101802605180267043224102094118

%N Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors

%C Column 7 of A208567

%H R. H. Hardin, <a href="/A208566/b208566.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2012