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 A316947 Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1

%I #8 Apr 20 2020 00:08:52

%S 0,7,160,18956,8641499,15440641209,109086632521219,

%T 3041266904462686586,334635446051408230633599,

%U 145323559617043972823631878181,249082491936418607489659470348823605

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

%C Diagonal of A316953.

%H R. H. Hardin, <a href="/A316947/b316947.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316953.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 17 2018

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Last modified September 26 05:27 EDT 2023. Contains 365653 sequences. (Running on oeis4.)