A282968 - OEIS

A282968

Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

%I #4 Feb 25 2017 17:48:18

%S 13,1062,70722,3128641,124683166,4646063540,163712015523,

%T 5565122952951,183787303136570,5933174659006889,188046122434187598,

%U 5869444194877190997,180856319148205715506,5511700995496951358631,166379407700820906229446

%N Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements.

%C Column 7 of A282969.

%H R. H. Hardin, <a href="/A282968/b282968.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A282969.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 25 2017