A304140 - OEIS

%I #4 May 07 2018 08:12:08

%S 1,99,33,25,135,34,48,785,96,164,5607,688,1198,43126,7146,13284,

%T 344363,85130,174124,2842665,1101826,2429578,24588566,15000202,

%U 34580418,227836525,209686868,495041722,2307698343,2968753906,7098677686

%N Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304141.

%H R. H. Hardin, <a href="/A304140/b304140.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304141.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 07 2018