A295550 - OEIS

%I #4 Nov 23 2017 12:13:36

%S 13,276,4374,78434,1385901,24486926,434357928,7703929911,136731507572,

%T 2425791860562,43046580346073,763911860239486,13556371257153923,

%U 240573778392292406,4269273591050766800,75763525863454457902

%N Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 3 or 4 1s.

%C Column 7 of A295551.

%H R. H. Hardin, <a href="/A295550/b295550.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A295551.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 23 2017