%I #4 Feb 04 2018 12:58:57
%S 8,85,205,649,2153,7016,22819,73931,239461,777197,2523034,8188618,
%T 26573796,86235511,279858388,908244102,2947587609,9565980797,
%U 31045039874,100752470139,326979037002,1061168684227,3443888186471,11176703761069
%N Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.
%C Column 4 of A299180.
%H R. H. Hardin, <a href="/A299176/b299176.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 6*a(n-1) -10*a(n-2) +6*a(n-3) -15*a(n-4) +31*a(n-5) -44*a(n-6) +33*a(n-7) +22*a(n-8) +97*a(n-9) -84*a(n-10) -139*a(n-11) -109*a(n-12) +111*a(n-13) +183*a(n-14) -32*a(n-15) +12*a(n-16) -113*a(n-17) +47*a(n-18) +33*a(n-19) -40*a(n-20) +26*a(n-21) -20*a(n-22) for n>28
%e Some solutions for n=6
%e ..0..1..0..0. .0..1..0..0. .0..0..1..0. .0..1..1..1. .0..0..0..0
%e ..0..0..0..1. .0..0..0..1. .1..0..0..0. .0..1..0..0. .1..1..0..1
%e ..1..0..0..0. .1..0..0..0. .0..0..0..1. .0..0..0..1. .0..1..1..1
%e ..0..0..0..1. .0..0..0..1. .1..0..0..0. .1..0..0..0. .1..1..1..0
%e ..0..1..0..0. .1..0..0..0. .0..0..0..1. .0..0..0..1. .0..1..1..1
%e ..0..1..1..1. .0..0..1..0. .0..1..0..0. .0..1..0..0. .1..1..0..1
%Y Cf. A299180.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 04 2018
|