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 A211580 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, five or six distinct values for every i,j,k<=n 1
 24, 116, 396, 1108, 2954, 7640, 19676, 51060, 133728, 356546, 961630, 2639484, 7312996, 20540736, 58061306, 165704028, 474754182, 1368989652, 3956576274, 11483585258, 33373408392, 97258918906, 283647632398, 828748613072 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..35 EXAMPLE Some solutions for n=5 .-2...-1...-2...-1....1....1....0....1...-2...-2....2....1....0...-2...-1....1 ..0....2...-1....1....2....1....1...-1....2...-1...-2...-1....1...-2....2...-2 .-1....1...-2....0....2....1....0....0....1....1....2....0....2...-2...-1...-1 ..1...-2...-2...-1....1....0...-1...-2...-1....2...-2....2....1...-2...-1...-2 .-1...-1...-1...-2....1...-2....2...-1....1....1....0....1....2...-1....2....1 ..0...-2....0....0....0....0....1....0....2....0...-2....0...-2...-1...-1...-2 CROSSREFS Sequence in context: A228433 A124952 A126411 * A211594 A211465 A293893 Adjacent sequences:  A211577 A211578 A211579 * A211581 A211582 A211583 KEYWORD nonn AUTHOR R. H. Hardin Apr 16 2012 STATUS approved

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Last modified May 24 02:53 EDT 2022. Contains 354005 sequences. (Running on oeis4.)