A206649 - OEIS

%I #6 Feb 22 2020 20:54:24

%S 224,301056,180716227,134185561617,94026798615720,66923081500826797,

%T 47431914936748228227,33655725191129741926976,

%U 23873388521297916754784915,16935776648670564255296973109,12013968003497755426965647537206

%N Number of nX7 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order

%C Column 7 of A206650

%H R. H. Hardin, <a href="/A206649/b206649.txt">Table of n, a(n) for n = 1..43</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 11 2012