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%I #4 Jul 20 2016 18:31:40
%S 32,404,8134,164645,3334854,67550874,1368326231,27717164160,
%T 561446064338,11372797129197,230370331746218,4666441245648374,
%U 94524645450606455,1914715759242977500,38784979537110927630,785638615177198244373
%N Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2.
%C Row 7 of A275228.
%H R. H. Hardin, <a href="/A275232/b275232.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 20*a(n-1) +57*a(n-2) -1206*a(n-3) +3096*a(n-4) +2306*a(n-5) -16957*a(n-6) +20440*a(n-7) -7755*a(n-8) for n>9
%e Some solutions for n=4
%e ..0..1..0..2. .0..1..0..2. .0..0..0..1. .0..1..0..0. .0..1..0..0
%e ..1..0..1..1. .2..0..1..0. .1..2..1..0. .2..2..1..2. .1..2..1..2
%e ..0..2..0..2. .0..1..0..1. .2..1..2..1. .0..1..2..1. .2..1..2..1
%e ..2..0..2..0. .2..0..2..0. .1..2..1..0. .1..0..0..2. .1..2..1..2
%e ..0..2..0..2. .0..2..0..1. .2..1..2..1. .2..1..2..1. .2..1..2..1
%e ..2..0..2..0. .1..0..2..0. .1..2..1..2. .1..2..1..2. .1..2..1..0
%e ..1..2..1..1. .0..1..0..1. .2..1..2..1. .2..1..0..1. .0..0..0..1
%Y Cf. A275228.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jul 20 2016
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