%I
%S 1,5,7,9,13,13,21,31,19,37,75,139,97,181,101,225,277,505,465,971,225
%N Number of 0..4 arrays x(0..n+1) of n+2 elements with zero n1st differences
%C Column 4 of A200272
%e All solutions for n=6
%e ..2....0....1....1....2....2....3....4....3....2....3....2....1
%e ..0....0....0....1....4....1....2....4....3....2....4....3....2
%e ..2....0....1....1....2....2....3....4....3....2....3....2....1
%e ..4....0....2....1....0....3....4....4....3....2....2....1....0
%e ..4....0....2....1....0....3....4....4....3....2....2....1....0
%e ..2....0....1....1....2....2....3....4....3....2....3....2....1
%e ..0....0....0....1....4....1....2....4....3....2....4....3....2
%e ..2....0....1....1....2....2....3....4....3....2....3....2....1
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 15 2011
