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Number of 4Xn 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
1

%I #5 Mar 31 2012 12:37:13

%S 241,58081,11086238,2152805235,418964575189,81562078260316,

%T 15877946803718090,3091067307303254867,601761995188912369335,

%U 117150369608909238252579,22806723149404940748682374

%N Number of 4Xn 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

%C Row 4 of A206838

%H R. H. Hardin, <a href="/A206842/b206842.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..1..3..3..2....2..3..0..3..0....0..1..0..2..1....1..3..3..3..3

%e ..0..1..3..2..3....1..3..0..1..1....0..0..1..1..0....2..1..3..1..1

%e ..3..2..1..2..0....1..0..3..1..0....2..2..0..0..1....0..1..3..3..1

%e ..0..0..0..0..0....0..1..3..2..0....1..1..2..0..0....2..1..1..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2012