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 A211746 Number of -3..3 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, six or seven distinct values for every i,j,k<=n 0
 48, 330, 1764, 7968, 31786, 117270, 410460, 1386380, 4570334, 14808240, 47415150, 150559236, 475404140, 1495840120, 4696349418, 14732952836, 46209158636, 145045251938, 455701735566 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..19. EXAMPLE Some solutions for n=5 .-1...-1....1...-2....1...-2....2...-3...-3....1...-1....3...-3....0....1...-2 ..3....3....2....2....2....1...-1....3...-3....0....2...-3...-2....3....2....2 ..2...-3....3....0...-2....2....2...-3....3...-1...-2....1...-3....0....0...-3 ..3....2....3....2....0...-1....1....2....3...-3....0...-1....1....1....1....3 .-1....0....3....0....2....1....2...-1...-3...-2...-3....0....3...-1....0....1 ..3...-2....2....2....0...-2....1....1....0...-3....0....3...-2....2...-1....3 CROSSREFS Sequence in context: A280022 A223396 A211735 * A211755 A211504 A211766 Adjacent sequences: A211743 A211744 A211745 * A211747 A211748 A211749 KEYWORD nonn AUTHOR R. H. Hardin Apr 20 2012 STATUS approved

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Last modified April 15 05:45 EDT 2024. Contains 371667 sequences. (Running on oeis4.)