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A326161 Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Jun 09 2019 08:39:35

%S 5,11,25,85,261,838,2644,8646,28076,91588,300287,985329,3236906,

%T 10639958,34985229,115030534,378227748,1243694242,4089598628,

%U 13448040812,44222592709,145423018099,478214308106,1572578892311,5171330324530

%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 4 of A326165.

%H R. H. Hardin, <a href="/A326161/b326161.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A326165.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 09 2019

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Last modified May 12 13:08 EDT 2024. Contains 372480 sequences. (Running on oeis4.)