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%I #4 Dec 31 2017 07:33:36
%S 1,2735,53175,573119,35919085,1272836591,28914051279,949224569894,
%T 32507021089982,940396282368163,28523594741249476,910897573503281049,
%U 27940827448011878850,852581385081080135117,26505475722899552411184
%N Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.
%C Row 7 of A297506.
%H R. H. Hardin, <a href="/A297512/b297512.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0..1..0. .0..0..0. .0..0..1. .0..1..1. .0..1..1. .0..1..1. .0..0..1
%e ..1..0..0. .1..1..1. .0..1..0. .1..0..0. .1..0..0. .0..0..1. .0..1..0
%e ..0..0..0. .0..0..0. .0..0..1. .0..0..0. .0..1..1. .0..0..0. .0..0..1
%e ..1..0..0. .0..0..0. .0..1..1. .0..1..1. .0..1..0. .0..1..1. .0..1..0
%e ..1..1..0. .0..0..0. .0..1..0. .0..0..0. .0..0..1. .1..0..0. .0..0..1
%e ..0..0..0. .0..0..1. .1..1..0. .1..1..1. .1..0..1. .1..1..0. .1..0..0
%e ..0..1..1. .1..1..0. .1..0..0. .0..1..0. .0..1..0. .0..0..0. .0..1..0
%Y Cf. A297506.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 31 2017
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