%I #5 Mar 04 2016 14:37:38
%S 2,9,64,620,7680,115920,2063880,42342912,983566800,25515160000,
%T 731128554024,22934195241984,781644611944014,28761550510694400,
%U 1136386416816000000,47984229920230342656,2156419762355192954760
%N Number of length-n 0..n arrays with every repeated value unequal to the previous repeated value plus one mod n+1.
%C Diagonal of A269776.
%H R. H. Hardin, <a href="/A269770/b269770.txt">Table of n, a(n) for n = 1..193</a>
%e Some solutions for n=6
%e ..1. .4. .5. .2. .2. .1. .1. .3. .1. .0. .0. .2. .3. .0. .6. .4
%e ..2. .0. .2. .2. .2. .5. .1. .1. .1. .5. .4. .0. .4. .5. .2. .2
%e ..1. .6. .1. .0. .5. .1. .5. .2. .2. .0. .1. .2. .3. .4. .0. .1
%e ..1. .6. .5. .0. .6. .6. .3. .2. .6. .1. .6. .0. .6. .5. .2. .5
%e ..5. .5. .2. .2. .0. .6. .4. .5. .3. .4. .4. .1. .0. .4. .1. .5
%e ..4. .6. .6. .2. .0. .4. .3. .2. .3. .6. .1. .1. .2. .5. .4. .6
%Y Cf. A269776.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 04 2016