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A297308 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's. 1

%I

%S 1,7,117,3808,484808,200646607,197589351469,578079526400673,

%T 5377924483062338484,139752957415982420114129,

%U 10302206214700301342887034910,2267938084956284272782357464419480

%N Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's.

%C Diagonal of A297314.

%H R. H. Hardin, <a href="/A297308/b297308.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A297314.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 28 2017

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Last modified May 28 00:30 EDT 2022. Contains 354110 sequences. (Running on oeis4.)