%I #6 Aug 11 2014 22:46:07
%S 2216,11714,61954,326786,1791552,9897540,54119058,297874488,
%T 1655842138,9105854856,50163046756,278949824936,1536234456774,
%U 8465287947954,47047724965648,259290094145420,1429038515851044,7936986520592132
%N Number of (n+2)X(1+2) 0..3 arrays with each 3X3 subblock having the sum of its 72 absolute element differences equal to 52, and no adjacent elements equal
%C Column 1 of A234867
%H R. H. Hardin, <a href="/A234862/b234862.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A234862/a234862.txt">Empirical recurrence of order 70</a>
%F Empirical recurrence of order 70 (see link above)
%e Some solutions for n=3
%e ..3..1..2....2..3..0....2..1..3....1..0..2....3..2..3....0..1..0....1..3..0
%e ..2..0..3....1..0..3....3..0..1....2..3..1....2..1..0....3..0..1....0..2..3
%e ..1..3..0....0..2..1....0..2..0....3..0..3....1..0..3....2..3..0....3..1..2
%e ..3..1..2....3..1..3....3..0..1....2..1..0....2..3..0....3..2..1....1..0..3
%e ..0..3..1....1..3..0....0..1..3....1..3..1....3..2..3....0..1..0....0..3..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 01 2014