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A317511 Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1

%I

%S 1,8,255,32256,16198017,32289056648,255495837970145,

%T 8025093993437265376,1000586105494959749616796,

%U 495218382735595839495210771842,972919685981025490418238840100646750

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

%C Diagonal of A317517.

%H R. H. Hardin, <a href="/A317511/b317511.txt">Table of n, a(n) for n = 1..14</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317517.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 30 2018

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Last modified June 13 20:25 EDT 2021. Contains 345009 sequences. (Running on oeis4.)