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A246896 Number of length 4+4 0..n arrays with some pair in every consecutive five terms totalling exactly n 1

%I #5 Sep 06 2014 15:49:08

%S 216,5711,46656,264981,942216,2934691,7216512,16571465,33296760,

%T 64134231,113503296,195133981,316514856,502575851,764948736,

%U 1145338641,1660700952,2376636895,3316691520,4579210661,6195659976,8307888051,10956656256

%N Number of length 4+4 0..n arrays with some pair in every consecutive five terms totalling exactly n

%C Row 4 of A246892

%H R. H. Hardin, <a href="/A246896/b246896.txt">Table of n, a(n) for n = 1..73</a>

%F Empirical: a(n) = 3*a(n-1) +2*a(n-2) -14*a(n-3) +5*a(n-4) +25*a(n-5) -20*a(n-6) -20*a(n-7) +25*a(n-8) +5*a(n-9) -14*a(n-10) +2*a(n-11) +3*a(n-12) -a(n-13)

%e Some solutions for n=3

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 06 2014

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Last modified August 14 03:23 EDT 2024. Contains 375146 sequences. (Running on oeis4.)