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 A211597 Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, three, four, six, seven or eight distinct values for every i,j,k<=n 1

%I

%S 24,80,246,716,2046,5782,16184,45312,126250,353302,986696,2770910,

%T 7777304,21945496,61932032,175572572,497905408,1417135306,4034892052,

%U 11520180346,32901609502,94162093264,269546074004,772772054834

%N Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, three, four, six, seven or eight distinct values for every i,j,k<=n

%H R. H. Hardin, <a href="/A211597/b211597.txt">Table of n, a(n) for n = 1..33</a>

%e Some solutions for n=5

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

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

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

%e ..1....2....1...-2....1....2....1...-1....1...-1....1...-1....2....1....1....2

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 16 2012

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Last modified November 28 05:56 EST 2022. Contains 358407 sequences. (Running on oeis4.)