|
%I #4 Apr 20 2018 11:12:27
%S 0,1172,28680,349273,11394429,306224454,7600681910,204093228252,
%T 5314350209386,138643667659572,3640560048826152,95207607193735652,
%U 2491557031345822081,65239890207048823769,1707524253811111768156
%N Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Row 7 of A303254.
%H R. H. Hardin, <a href="/A303258/b303258.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
%e ..0..0..1..1..0. .0..0..1..0..1. .0..0..1..0..1. .0..0..1..0..0
%e ..1..0..1..0..1. .1..0..1..0..1. .1..0..1..1..1. .0..1..0..0..0
%e ..0..1..1..1..0. .0..1..1..1..0. .1..1..1..0..1. .1..1..0..1..0
%e ..0..1..0..0..0. .0..0..0..1..0. .1..0..0..0..0. .1..0..1..0..1
%e ..0..0..0..1..0. .0..1..0..0..1. .1..1..0..1..1. .1..1..1..0..0
%e ..1..1..0..1..1. .1..1..0..1..0. .0..0..0..1..1. .1..0..0..1..1
%Y Cf. A303254.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 20 2018
| 