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A281055 Number of nX7 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%I A281055 #4 Jan 13 2017 16:58:08
%S A281055 13,535,2828,10570,32370,87995,221212,526340,1201939,2661939,5752796,
%T A281055 12190173,25413086,52258597,106216045,213723050,426288170,843735147,
%U A281055 1658596579,3240610144,6297012052,12175728717,23437264280,44930659786
%N A281055 Number of nX7 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
%C A281055 Column 7 of A281056.
%H A281055 R. H. Hardin, <a href="/A281055/b281055.txt">Table of n, a(n) for n = 1..210</a>
%F A281055 Empirical: a(n) = 5*a(n-1) -6*a(n-2) -4*a(n-3) +5*a(n-4) +9*a(n-5) -3*a(n-6) -3*a(n-7) -3*a(n-8) -9*a(n-9) +6*a(n-11) +8*a(n-12) +2*a(n-13) +3*a(n-14) -3*a(n-15) -3*a(n-16) -3*a(n-17) -a(n-18) -a(n-19) for n>23
%e A281055 Some solutions for n=4
%e A281055 ..0..1..0..1..0..0..1. .0..1..1..1..0..1..0. .0..1..0..1..1..1..0
%e A281055 ..0..1..0..1..1..0..1. .0..1..0..1..0..1..0. .0..1..0..1..0..0..1
%e A281055 ..0..1..0..0..1..0..1. .0..1..0..1..0..1..0. .0..1..0..1..1..0..1
%e A281055 ..0..1..1..1..1..0..1. .1..0..1..0..1..1..0. .0..1..0..0..1..0..0
%Y A281055 Cf. A281056.
%K A281055 nonn
%O A281055 1,1
%A A281055 _R. H. Hardin_, Jan 13 2017