%I #5 Feb 29 2016 06:58:30
%S 2,9,60,568,6890,102202,1792788,36313762,834223586,21432797300,
%T 608957461160,18959064989614,641864430972850,23477543114153020,
%U 922643768971802072,38770277525975117782,1734684393525837427074
%N Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by other than one.
%C Diagonal of A269537.
%H R. H. Hardin, <a href="/A269530/b269530.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..1. .2. .1. .1. .5. .4. .3. .2. .4. .1. .5. .5. .3. .3. .3. .4
%e ..0. .2. .5. .4. .2. .0. .2. .4. .0. .4. .2. .0. .1. .2. .2. .3
%e ..0. .3. .4. .2. .0. .2. .0. .3. .2. .0. .3. .1. .0. .5. .3. .2
%e ..3. .5. .4. .1. .5. .4. .1. .1. .2. .3. .2. .5. .5. .1. .5. .1
%e ..1. .1. .2. .0. .1. .2. .2. .4. .1. .3. .0. .2. .5. .5. .3. .4
%Y Cf. A269537.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 29 2016