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A297726 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s. 1

%I

%S 1,2735,110551,2139403,91994155,4238895126,154327332017,5699564719228,

%T 225335188630385,8767500946143576,335583072729414460,

%U 12937974222045436776,500589141612794916455,19317070336607603879897

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

%C Row 7 of A297720.

%H R. H. Hardin, <a href="/A297726/b297726.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

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

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

%Y Cf. A297720.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 04 2018

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Last modified September 18 20:55 EDT 2019. Contains 327181 sequences. (Running on oeis4.)