A301909 - OEIS

%I #4 Mar 28 2018 16:11:44

%S 16,1,16,10,12,92,320,1588,7234,34477,171770,861562,4318341,21575848,

%T 107657594,537357962,2682516710,13395048430,66897233633,334110946467,

%U 1668703731020,8334274683849,41625156594335,207894886362394

%N Number of 5Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

%C Row 5 of A301906.

%H R. H. Hardin, <a href="/A301909/b301909.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301906.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 28 2018