|
%I #4 Jul 28 2018 20:50:27
%S 1,11,17,36,131,322,762,2337,6165,15869,44914,121947,324214,894468,
%T 2441451,6589367,18023035,49207556,133636847,364592196,994849120,
%U 2708442209,7384462695,20140768449,54883108164,149619672899,407984044766
%N Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Column 3 of A317458.
%H R. H. Hardin, <a href="/A317453/b317453.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +4*a(n-2) +16*a(n-3) -11*a(n-4) -59*a(n-5) -99*a(n-6) +30*a(n-7) +252*a(n-8) +272*a(n-9) +45*a(n-10) -323*a(n-11) -234*a(n-12) -12*a(n-13) +50*a(n-14) -117*a(n-15) -84*a(n-16) -38*a(n-17) -4*a(n-18) for n>20
%e Some solutions for n=5
%e ..0..0..1. .0..1..0. .0..1..0. .0..1..1. .0..1..0. .0..1..0. .0..0..0
%e ..1..1..1. .0..0..0. .0..1..0. .1..0..1. .1..0..0. .0..1..0. .0..1..0
%e ..0..0..1. .0..1..0. .0..0..0. .1..1..0. .0..0..0. .0..0..0. .0..0..1
%e ..1..1..1. .1..0..1. .0..1..0. .1..0..0. .0..0..1. .1..0..0. .0..1..1
%e ..0..0..1. .1..1..1. .0..0..0. .0..1..0. .0..1..0. .0..1..0. .1..0..1
%Y Cf. A317458.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jul 28 2018
|
