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Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Mar 19 2018 09:54:37

%S 2,15,34,101,320,1167,3961,13974,49388,171718,595933,2069269,7184407,

%T 24983410,87005062,303301112,1058018103,3691794974,12883245735,

%U 44960338427,156905033430,547579453383,1911021086139,6669509723637

%N Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 4 of A301361.

%H R. H. Hardin, <a href="/A301357/b301357.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301361.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 19 2018