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

%I #6 Jun 15 2020 14:49:20

%S 1,8,247,29408,13431706,23582064542,159047224409362,

%T 4121184916626976747,410254820466598294243538,

%U 156900221075811012583120150328,230531929217067955283511588326278811

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

%C Diagonal of A299654.

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

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

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

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

%Y Cf. A299654.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 15 2018