|
%I #4 May 15 2018 13:29:32
%S 16,22,53,179,560,1726,5205,15474,46577,140882,425811,1284730,3876203,
%T 11701804,35329457,106648194,321916587,971745234,2933418071,
%U 8855071730,26730426635,80690036458,243576592865,735277676028,2219559525935
%N Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Column 5 of A304604.
%H R. H. Hardin, <a href="/A304601/b304601.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 3*a(n-1) +3*a(n-2) -11*a(n-3) +10*a(n-4) +4*a(n-5) -67*a(n-6) +52*a(n-7) +80*a(n-8) -134*a(n-9) +50*a(n-10) +85*a(n-11) -134*a(n-12) +124*a(n-13) +62*a(n-14) -158*a(n-15) +85*a(n-16) -26*a(n-17) -85*a(n-18) +50*a(n-19) -19*a(n-20) +32*a(n-21) -22*a(n-22) +5*a(n-23) +43*a(n-24) -59*a(n-25) +33*a(n-26) +12*a(n-27) -34*a(n-28) +23*a(n-29) -4*a(n-30) -5*a(n-31) +4*a(n-32) -a(n-33) for n>39
%e Some solutions for n=5
%e ..0..1..0..0..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0
%e ..0..0..0..0..0. .1..1..0..0..0. .0..0..0..0..0. .0..0..1..1..0
%e ..1..0..0..0..1. .1..1..0..0..0. .0..0..0..0..0. .0..1..0..1..0
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .1..0..1..0..0
%e ..0..1..0..1..0. .0..0..0..0..0. .0..1..0..0..0. .1..1..0..0..0
%Y Cf. A304604.
%K nonn
%O 1,1
%A _R. H. Hardin_, May 15 2018
| 