A221319 - OEIS

%I #4 Jan 10 2013 19:39:47

%S 1,2,7,14,30,76,188,444,1071,2638,6460,15756,38783,95778,236270,

%T 584394,1448972,3596146,8935547,22233108,55380945,138076092,344565415,

%U 860595928,2151093021,5380523278,13467284628,33729132584,84523860027,211927633632

%N Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 6

%C Column 6 of A221321

%H R. H. Hardin, <a href="/A221319/b221319.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=9

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

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

%e ..0....0....4....2....1....1....0....1....1....2....3....0....0....1....0....0

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

%e ..3....0....1....2....1....2....2....1....1....0....0....1....1....4....0....0

%e ..0....3....0....0....0....1....1....2....0....3....1....0....0....0....4....2

%e ..1....0....1....1....2....0....0....1....1....0....2....1....4....1....0....0

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 10 2013