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A297768 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s. 1

%I

%S 1,69,28565,720785,18733087,1504842706,108229776807,5471123716394,

%T 286817881089193,17003133505644511,992034690844277806,

%U 55560988268455263857,3131312608795918940918,178941939002152696425045

%N Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s.

%C Row 7 of A297762.

%H R. H. Hardin, <a href="/A297768/b297768.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

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

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

%Y Cf. A297762.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 05 2018

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Last modified August 17 00:01 EDT 2022. Contains 356180 sequences. (Running on oeis4.)