|
%I #4 Apr 11 2018 12:02:03
%S 0,1172,10660,106793,2320879,35549458,637088915,11181864782,
%T 188509564214,3339792969770,57406756149300,997632805281762,
%U 17363763785624592,300575131517843683,5229363965628293685,90736499929821199253
%N Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Row 7 of A302670.
%H R. H. Hardin, <a href="/A302673/b302673.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..1..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..1..1
%e ..1..0..1..0..1. .0..0..1..0..1. .0..0..1..1..0. .1..0..1..0..1
%e ..1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..0. .0..1..1..0..0
%e ..1..1..1..0..1. .0..1..0..1..1. .0..0..0..0..1. .0..0..0..0..0
%e ..1..0..1..1..1. .1..1..0..0..1. .1..1..1..1..0. .1..1..1..1..1
%e ..0..0..1..0..1. .0..1..1..0..1. .1..0..0..1..1. .0..0..0..0..1
%e ..1..1..1..1..0. .1..0..0..1..0. .1..1..0..0..1. .0..0..1..1..1
%Y Cf. A302670.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 11 2018
| 