%I #5 Mar 01 2016 12:38:41
%S 2,9,60,572,7030,105892,1886252,38768412,902743646,23482784400,
%T 674804472216,21227322458468,725465523386294,26765145874993234,
%U 1060182321437102136,44874027105660248520,2021234030434596074938
%N Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by one or less.
%C Diagonal of A269606.
%H R. H. Hardin, <a href="/A269600/b269600.txt">Table of n, a(n) for n = 1..193</a>
%e Some solutions for n=6
%e ..3. .2. .5. .1. .1. .3. .3. .1. .0. .6. .4. .5. .2. .3. .6. .4
%e ..4. .2. .6. .2. .4. .5. .5. .5. .3. .4. .2. .6. .3. .5. .0. .2
%e ..6. .0. .5. .0. .0. .6. .6. .4. .0. .2. .0. .2. .4. .1. .6. .0
%e ..3. .0. .6. .1. .4. .5. .3. .1. .1. .5. .0. .3. .2. .4. .6. .5
%e ..4. .3. .6. .6. .5. .3. .1. .3. .0. .0. .3. .5. .0. .6. .4. .3
%e ..1. .0. .3. .2. .4. .1. .5. .5. .3. .6. .3. .0. .1. .4. .1. .2
%Y Cf. A269606.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 01 2016