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%I #5 May 17 2014 09:31:31
%S 6,32,150,690,3311,16968,93103,544920,3386262,22243902,153850981,
%T 1116625523,8478969009,67185160511,554235206898,4750165417926,
%U 42219358673456,388485398829204,3695187060252009,36282147267628868
%N Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..n introduced in 0..n order
%C Diagonal of A242549
%H R. H. Hardin, <a href="/A242542/b242542.txt">Table of n, a(n) for n = 1..132</a>
%e Some solutions for n=4
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..1....0....1....0....1....1....1....1....1....1....1....1....1....1....1....1
%e ..2....1....0....1....0....2....2....2....1....2....2....1....1....0....1....2
%e ..0....2....2....2....2....0....2....1....0....1....0....2....1....2....0....1
%e ..1....2....2....1....0....3....1....0....2....3....2....1....0....1....1....2
%e ..0....1....1....3....3....1....3....2....1....3....3....1....1....0....0....1
%e ..3....2....0....2....0....3....4....3....3....2....2....2....1....0....2....3
%K nonn
%O 1,1
%A _R. H. Hardin_, May 17 2014
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