A303414 - OEIS

%I #4 Apr 23 2018 10:44:45

%S 0,421,10384,15852,115770,2158662,24386918,158640643,1293822589,

%T 14788283853,149020593141,1275569366713,11671994401668,

%U 115222219445362,1107799093548111,10250710845474527,96126433140397235,918622040686576956

%N Number of 7Xn 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A303410.

%H R. H. Hardin, <a href="/A303414/b303414.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A303410.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 23 2018