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Number of 0..3 arrays x(0..n) of n+1 elements with zero n-1st differences
0

%I #4 Mar 31 2012 12:36:37

%S 1,4,6,8,14,18,24,56,26,26,54,226,260,482,196,54,128,728,1226,4106,

%T 1168,272,892,4798,1390,1298,962,216,470,2104

%N Number of 0..3 arrays x(0..n) of n+1 elements with zero n-1st differences

%C Column 3 of A200082

%e Some solutions for n=6

%e ..3....1....3....1....2....1....0....2....3....2....0....0....2....1....3....2

%e ..1....2....2....2....3....0....1....1....3....1....0....2....0....3....3....2

%e ..1....1....1....3....2....1....2....0....3....2....0....2....0....3....1....2

%e ..2....0....1....3....1....2....2....0....3....3....0....1....1....2....0....2

%e ..3....0....2....2....1....2....1....1....3....3....0....0....2....1....1....2

%e ..3....1....3....1....2....1....0....2....3....2....0....0....2....1....3....2

%e ..1....2....2....2....3....0....1....1....3....1....0....2....0....3....3....2

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 13 2011