%I
%S 15,525,6723,58409,426289,2918103,19899645,139354433,1014707218,
%T 7708112426,61057289906,503473697674,4313566395798,38328567460364,
%U 352618771825166,3353663922642364,32927374508631249,333319732229912935
%N Number of length(n+6) 0..n arrays with no repeated value equal to the previous repeated value, with new values introduced in sequential order.
%C Subdiagonal 6 of A268956.
%H R. H. Hardin, <a href="/A268960/b268960.txt">Table of n, a(n) for n = 1..116</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. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1. .1
%e ..0. .2. .0. .2. .1. .2. .2. .2. .2. .2. .2. .1. .0. .0. .2. .1
%e ..2. .3. .1. .2. .2. .1. .1. .2. .0. .0. .3. .2. .2. .2. .1. .0
%e ..2. .2. .2. .3. .2. .0. .2. .3. .1. .1. .1. .0. .0. .3. .0. .2
%e ..3. .3. .1. .3. .3. .3. .0. .0. .3. .2. .1. .1. .2. .1. .2. .0
%e ..0. .1. .3. .0. .4. .2. .3. .2. .3. .3. .4. .2. .3. .0. .2. .2
%e ..2. .3. .0. .3. .2. .2. .0. .0. .1. .4. .3. .1. .1. .1. .3. .2
%e ..1. .3. .4. .4. .3. .0. .2. .2. .4. .4. .3. .2. .4. .1. .4. .3
%e ..2. .0. .2. .3. .4. .2. .3. .4. .1. .1. .1. .2. .3. .0. .1. .1
%Y Cf. A268956.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 16 2016
