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 A300967 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0

%I

%S 0,3,72,5362,1396701,1248976325,3830408271334,40336079370455720,

%T 1458512970584631160987,181083690540906210546159511,

%U 77197439558945056115280452740665

%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A300973.

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

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

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

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

%Y Cf. A300973.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 17 2018

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Last modified September 24 17:33 EDT 2021. Contains 347651 sequences. (Running on oeis4.)