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Number of nXn 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0

%I #4 Jun 06 2019 07:51:10

%S 1,8,161,8628,1233763,463572941,457515856087,1187662505828132,

%T 8109848158608706092,145652282125715208618002,

%U 6879822326742091298103753274

%N Number of nXn 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A326105.

%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..1

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

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

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

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

%Y Cf. A326105.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 06 2019