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A298842 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero. 0

%I #6 Jun 15 2020 11:38:47

%S 0,4,48,466,5101,74685,1276034,30242236,1056423010,50039513246,

%T 3406811335705,353276120560238,52792202092264104

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

%C Diagonal of A298846.

%e Some solutions for n=6

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

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

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

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

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

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

%Y Cf. A298846.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 27 2018

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Last modified March 28 16:28 EDT 2024. Contains 371254 sequences. (Running on oeis4.)