A320401 - OEIS

%I #4 Oct 12 2018 12:29:42

%S 64,4105,94842,2908839,83509525,2392115850,69104597430,1987324601389,

%T 57271367516963,1649293396078122,47501690934943189,

%U 1368095396558548373,39401919356219060903,1134809125230760299100,32683331680225837200024

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

%C Column 7 of A320402.

%H R. H. Hardin, <a href="/A320401/b320401.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320402.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 12 2018