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 A298771 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 0

%I #6 Jun 15 2020 11:26:50

%S 0,3,15,78,682,11320,484813,22160831,2093453587,397340932476

%N Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298775.

%e Some solutions for n=6

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

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

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

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

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

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

%Y Cf. A298775.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 26 2018

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Last modified September 23 12:40 EDT 2023. Contains 365551 sequences. (Running on oeis4.)