|
%I #4 Jan 19 2018 08:37:48
%S 0,240,204,15248,206239,4095727,112275165,2871621220,62756244756,
%T 1680472622565,43197208627165,1038517293951991,26665044675200600,
%U 682574655104085964,16923243467936517267,429230559842341481820
%N Number of nX7 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Column 7 of A298454.
%H R. H. Hardin, <a href="/A298453/b298453.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..1..1..1..1..1. .0..0..0..0..0..1..1. .0..0..0..0..0..0..0
%e ..1..1..1..1..1..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
%e ..1..1..0..0..1..1..1. .1..1..0..1..1..0..0. .0..1..1..1..1..0..1
%e ..1..1..0..0..1..1..1. .1..1..0..1..1..1..1. .1..0..1..1..1..0..1
%Y Cf. A298454.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 19 2018
| 