%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
