|
%I #4 Mar 07 2018 07:33:37
%S 21,11,34,191,546,4067,17412,112660,634311,3789374,21768434,127922510,
%T 740390307,4332789535,25223205362,147301185909,859118123084,
%U 5015850403762,29268855094463,170854627899949,997148101828012
%N Number of nX7 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Column 7 of A300506.
%H R. H. Hardin, <a href="/A300505/b300505.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..1..0..0..0. .0..1..0..1..1..1..0. .0..1..0..0..0..0..0
%e ..1..0..0..0..0..1..1. .0..1..0..0..1..1..0. .1..0..0..1..0..1..1
%e ..1..0..1..1..1..1..1. .1..1..0..0..1..0..0. .0..1..0..0..0..0..0
%e ..0..1..1..0..0..0..1. .1..1..0..1..1..0..0. .1..0..0..1..1..0..0
%e ..1..0..0..0..0..0..0. .0..1..0..1..1..1..0. .0..1..1..1..1..1..0
%Y Cf. A300506.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 07 2018
| 