|
%I #4 Aug 10 2018 10:32:57
%S 0,45,1074,25169,741031,20734591,580702029,16327953218,458323749120,
%T 12865640919987,361242608740754,10141976947455132,284740846034105659,
%U 7994281018770192184,224444092268529045038,6301399036645662384611
%N Number of nX7 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Column 7 of A317896.
%H R. H. Hardin, <a href="/A317895/b317895.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..1..0..1..0..1..0. .0..1..0..0..1..1..0. .0..1..0..1..1..0..1
%e ..1..0..1..1..1..1..1. .1..0..1..1..0..0..1. .1..0..0..1..0..0..0
%e ..0..0..1..0..0..1..0. .0..1..0..0..1..1..0. .0..1..1..0..1..1..0
%e ..1..1..1..0..1..1..0. .1..0..0..0..1..0..1. .0..1..0..0..1..0..1
%e ..0..1..0..1..0..0..1. .0..1..1..1..0..1..0. .0..1..1..0..0..1..0
%Y Cf. A317896.
%K nonn
%O 1,2
%A _R. H. Hardin_, Aug 10 2018
| 