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 A296321 Number of nXn 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 neighboring 1s. 0

%I

%S 1,3,11,61,853,20088,850404,72224019,11207386103,3245575984755,

%T 1784744625714267,1830394475306895557,3517200566091635085954,

%U 12698075318404649075573041,85871949097296276009847589332

%N Number of nXn 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 neighboring 1s.

%C Diagonal of A296327.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A296327.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 10 2017

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Last modified March 28 20:01 EDT 2020. Contains 333103 sequences. (Running on oeis4.)