The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Apr 07 2018 17:07:40
%S 64,2785,4754,12442,69537,518736,2342685,10963076,58365289,307637792,
%T 1559714448,8017915598,41579079715,214421759223,1104296541035,
%U 5698818950760,29408079178051,151670498894737,782355792604657
%N Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Row 7 of A302415.
%H R. H. Hardin, <a href="/A302420/b302420.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..1..0..0. .0..1..0..1..1. .0..0..1..0..1. .0..1..1..0..0
%e ..0..0..1..1..1. .1..1..0..1..0. .1..0..1..0..0. .0..0..0..1..1
%e ..1..1..1..0..1. .0..0..0..0..0. .1..0..1..1..1. .0..1..0..1..0
%e ..1..0..1..0..1. .0..1..0..1..1. .1..0..1..0..1. .0..1..0..0..0
%e ..1..0..1..1..1. .0..1..0..1..0. .1..0..1..0..1. .0..1..0..0..1
%e ..1..0..1..0..0. .0..1..0..0..0. .1..0..0..0..0. .0..1..0..1..0
%e ..1..0..1..0..1. .1..0..1..1..0. .1..0..1..1..1. .0..1..0..1..1
%Y Cf. A302415.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 07 2018