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Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0

%I #4 Jul 28 2018 20:57:53

%S 0,3,16,1429,386855,426934467,1798167135483,29212515031084662,

%T 1822743346281286133973,437041238063851834989854827

%N Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A317465.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317465.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 28 2018