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%I #4 Mar 18 2017 12:27:07
%S 0,0,87,906,7988,69468,575456,4604744,36137513,279163040,2128757750,
%T 16067783050,120264121036,893798288058,6602798852295,48525145143750,
%U 355015663432086,2587074206224930,18786624241231104,135997998678920894
%N Number of 3Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.
%C Row 3 of A283950.
%H R. H. Hardin, <a href="/A283952/b283952.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 10*a(n-1) -15*a(n-2) +50*a(n-3) -483*a(n-4) -688*a(n-5) -2954*a(n-6) -1998*a(n-7) +1187*a(n-8) +9770*a(n-9) +26575*a(n-10) +21254*a(n-11) -469*a(n-12) -42264*a(n-13) -80523*a(n-14) -54448*a(n-15) +18704*a(n-16) +71312*a(n-17) +57531*a(n-18) +12848*a(n-19) -15198*a(n-20) -17226*a(n-21) -8382*a(n-22) -2048*a(n-23) +107*a(n-24) +234*a(n-25) +59*a(n-26) +4*a(n-27) -4*a(n-28)
%e Some solutions for n=4
%e ..1..1..1..0. .1..1..1..0. .1..1..0..0. .1..0..1..0. .1..0..1..1
%e ..1..1..0..1. .1..1..0..0. .0..0..1..1. .0..1..1..1. .0..1..0..1
%e ..1..0..1..0. .1..1..1..1. .1..1..1..1. .1..0..1..0. .1..0..1..0
%Y Cf. A283950.
%K nonn
%O 1,3
%A _R. H. Hardin_, Mar 18 2017
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