A300320 - OEIS

%I #4 Mar 02 2018 18:06:02

%S 21,348,3875,203113,4705725,178277369,7221094975,257924884697,

%T 9967764866344,389921000823962,14836114676415671,573338970258951373,

%U 22198397267009431746,854454138056008237524,32994344327963006514743

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A300321.

%H R. H. Hardin, <a href="/A300320/b300320.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300321.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 02 2018