A300105 - OEIS

%I #6 Jun 22 2021 14:38:11

%S 3,174,861,5526,59014,526613,4330629,39686493,361139457,3194909963,

%T 28699887325,258969501853,2322843011671,20860078819477,

%U 187642483358977,1686368065001331,15153805451302274,136224084732985026

%N Number of n X 5 0..1 arrays with every element equal to 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 5 of A300108.

%H R. H. Hardin, <a href="/A300105/b300105.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300108.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 25 2018