A303039 - OEIS

%I #4 Apr 17 2018 13:22:59

%S 21,363,360,2926,11079,59654,345668,2060154,13122422,89037375,

%T 632329265,4677904112,35799149696,280072132889,2226022479526,

%U 17895152751103,144903511517451,1178993189869482,9624601342853800,78735791021587131

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A303040.

%H R. H. Hardin, <a href="/A303039/b303039.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303040.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 17 2018