login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Number of (n+2)X(7+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order
1

%I #4 Nov 05 2013 18:36:06

%S 43,264,1799,12179,102113,748665,5930126,48317804,390225796,

%T 3267809753,27184285056,228686827731,1938757497433,16432432134267,

%U 140079591842774,1195812427594821,10221439423090293,87552309666153978,750295493573918472

%N Number of (n+2)X(7+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order

%C Column 7 of A231227

%H R. H. Hardin, <a href="/A231226/b231226.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for n=3

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

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

%e ..0..0..1..1..1..1..1..0..0....2..2..0..0..0..0..1..1..1

%e ..1..1..0..0..1..1..0..0..0....2..2..2..0..0..0..1..1..1

%e ..1..1..0..0..0..0..0..0..0....2..2..2..0..0..0..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 05 2013