A300039 - OEIS

%I #4 Feb 23 2018 08:35:50

%S 8,2907,128610,4532025,173419447,6789384478,262361247480,

%T 10149632583491,393165011518395,15223417803313451,589419698633734436,

%U 22823105070326713081,883732801229613846760,34218687812298572827543

%N Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A300040.

%H R. H. Hardin, <a href="/A300039/b300039.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..0..0..0..1..0..1. .0..0..1..1..1..1..0

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

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

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

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

%Y Cf. A300040.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 23 2018