|
%I #4 Dec 28 2017 11:36:41
%S 128,987,35568,538819,12964224,242728633,5193690642,103574723331,
%T 2142578906273,43505006669691,891632017546020,18191907199249891,
%U 371961523388530138,7597903148736232018,155267718780879744807
%N Number of 7Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 0 or 2 neighboring 1s.
%C Row 7 of A297338.
%H R. H. Hardin, <a href="/A297344/b297344.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
%e ..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0
%e ..0..1..0..1..0. .0..0..0..0..1. .0..1..0..0..1. .0..0..0..0..0
%e ..0..1..0..0..1. .0..0..1..0..1. .0..0..1..0..0. .0..0..0..0..0
%e ..0..0..1..0..0. .0..0..1..0..0. .1..0..0..1..0. .0..1..0..0..0
%e ..0..0..0..1..0. .0..0..1..1..0. .0..0..0..0..0. .0..0..0..0..0
%e ..0..1..0..0..1. .0..1..1..0..0. .0..0..0..0..0. .1..0..0..0..1
%Y Cf. A297338.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 28 2017
| 