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Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 08 2018 07:42:10

%S 1,864,2016,35788,789026,15983426,362523451,7903384843,176308045666,

%T 3941879866879,87755060397182,1960425981130977,43770946796249155,

%U 977291527301161623,21823838569731609645,487330565461513151643

%N Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

%C Column 7 of A297915.

%H R. H. Hardin, <a href="/A297914/b297914.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A297915.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 08 2018