login
Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Apr 08 2018 10:02:16

%S 1,123,140,1518,8869,61254,404761,2822737,19107381,133223036,

%T 940543590,6607193483,46568712258,329320886502,2326854046675,

%U 16446895955352,116374820631423,823487172775195,5827287415111296,41246655697979835

%N Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A302460.

%H R. H. Hardin, <a href="/A302459/b302459.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..0..1..1..0..0..1. .0..0..1..1..1..0..0. .0..1..1..0..1..0..0

%e ..0..0..1..1..0..0..0. .0..0..1..1..0..0..0. .1..1..0..0..0..0..0

%e ..1..0..0..1..1..0..1. .1..0..1..1..1..0..1. .0..1..0..0..1..1..1

%e ..1..0..0..1..1..0..1. .0..0..0..1..0..0..1. .1..1..0..0..0..1..1

%e ..0..0..1..1..0..0..0. .1..0..0..1..0..0..0. .1..1..1..1..1..1..1

%Y Cf. A302460.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 08 2018