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A304227 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero. 1

%I #4 May 08 2018 11:05:06

%S 16,8,11,20,31,89,237,494,1162,3043,7055,16267,40336,96915,227050,

%T 547472,1320937,3136649,7499193,18030816,43081957,102910086,246694312,

%U 590518839,1411720911,3379538295,8091060448,19355807443,46317931730,110870212016

%N Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.

%C Column 5 of A304230.

%H R. H. Hardin, <a href="/A304227/b304227.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +9*a(n-3) -14*a(n-6) for n>10

%e Some solutions for n=5

%e ..0..0..0..0..0. .0..1..1..1..1. .0..0..0..0..1. .0..0..0..0..0

%e ..0..0..0..0..0. .1..0..1..1..1. .0..0..0..1..0. .0..0..0..1..0

%e ..0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0. .0..0..1..0..0

%e ..0..0..1..1..0. .1..1..1..0..1. .0..0..0..1..0. .0..0..0..0..0

%e ..0..0..0..0..0. .1..1..1..1..0. .0..0..0..0..1. .0..0..0..0..0

%Y Cf. A304230.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 08 2018

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)