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%I A207551 #5 Mar 31 2012 12:37:18
%S A207551 26,676,14974,327518,7169168,156957792,3434478282,75148438711,
%T A207551 1644205521524,35974053130024,787081975249822,17220673773304768,
%U A207551 376773189954832060,8243464731968266960,180359713794644968034
%N A207551 Number of 3Xn 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
%C A207551 Row 3 of A207550
%H A207551 R. H. Hardin, <a href="/A207551/b207551.txt">Table of n, a(n) for n = 1..210</a>
%F A207551 Empirical: a(n) = 26*a(n-1) -16*a(n-2) -1876*a(n-3) +4292*a(n-4) +30528*a(n-5) -63675*a(n-6) -102108*a(n-7) -7290*a(n-8) -8276*a(n-9) +1540054*a(n-10) -8712728*a(n-11) +14630137*a(n-12) +66316954*a(n-13) -83820630*a(n-14) -96411600*a(n-15) -100641171*a(n-16) -89584866*a(n-17) +324694661*a(n-18) +23361212*a(n-19) +278938916*a(n-20) +273589832*a(n-21) -134950279*a(n-22) -86365344*a(n-23) +5316948*a(n-24) +71280*a(n-25) for n>26
%e A207551 Some solutions for n=4
%e A207551 ..1..2..0..2....2..2..2..2....2..0..2..1....1..1..1..2....0..2..2..0
%e A207551 ..0..0..2..0....0..0..0..0....2..0..0..0....1..1..1..1....0..0..0..0
%e A207551 ..1..2..2..2....1..2..2..1....0..2..0..1....2..1..2..2....0..2..1..0
%K A207551 nonn
%O A207551 1,1
%A A207551 _R. H. Hardin_ Feb 18 2012

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