A320369 - OEIS

%I #4 Oct 11 2018 14:11:14

%S 32,2048,80568,3027408,114844160,4358279956,165355751224,

%T 6274017360108,238053099337172,9032378740709556,342712998628198880,

%U 13003463911279607676,493386823293841101596,18720439479430945278656

%N Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 6 of A320371.

%H R. H. Hardin, <a href="/A320369/b320369.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A320369/a320369.txt">Empirical recurrence of order 70</a>

%F Empirical recurrence of order 70 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320371.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 11 2018