A281806 - OEIS

%I #4 Jan 30 2017 10:45:13

%S 0,87,865,8354,71445,575062,4480480,33526931,246399359,1768719496,

%T 12506519769,87220471545,600957372469,4100864353926,27733540904781,

%U 186134535819880,1240811810649533,8221127809327654,54176483907555951

%N Number of 5Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Row 5 of A281802.

%H R. H. Hardin, <a href="/A281806/b281806.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A281802.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 30 2017