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Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Aug 26 2018 11:15:35

%S 1,23,9,225,839,2489,11802,45560,190929,738777,2951001,11787988,

%T 47807984,192301338,774415325,3108883286,12511830132,50334154452,

%U 202614148901,815213327373,3280146476950,13197123253932,53103818253054

%N Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A318423.

%H R. H. Hardin, <a href="/A318422/b318422.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318423.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 26 2018