A304138 - OEIS

%I #4 May 07 2018 08:10:43

%S 1,26,15,20,39,83,135,356,967,1769,4507,12371,26399,63179,165527,

%T 395372,931693,2375263,6054813,14584383,36884172,96563393,240916042,

%U 612770703,1617727061,4165995075,10744297142,28487711557,75039015902,196719916483

%N Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

%C Column 5 of A304141.

%H R. H. Hardin, <a href="/A304138/b304138.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A304138/a304138.txt">Empirical recurrence of order 91</a>

%F Empirical recurrence of order 91 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304141.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 07 2018