A281721 - OEIS

%I #4 Jan 28 2017 13:50:47

%S 64,22,30,1625,10738,142023,1721319,18779855,230037168,2667856089,

%T 31098469537,368912116468,4299998362349,50615320723942,

%U 594638970383925,6971797426746210,81973100282054094,962121842116973906

%N Number of 7Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%C Row 7 of A281715.

%H R. H. Hardin, <a href="/A281721/b281721.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A281715.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 28 2017