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A199906 Number of -5..5 arrays x(0..n-1) of n elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2) 1
1, 8, 60, 256, 1836, 12872, 77874, 547604, 3784512, 25525476, 179010266, 1249682864, 8709865930, 61360521500, 432263649142, 3049721406636, 21595190691722, 153069769124720, 1086568858888600, 7726348605601340 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A199909

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=6

.-1....0...-4...-4...-4....3...-3....0...-2...-4....1....0....5...-3...-5....3

..3...-5....1....3....3....4....1...-5....2....4....3...-5...-2....5....0...-5

.-1...-3....2....5....1...-4...-4...-3....3....0...-1....5....3....3....1...-3

..4....4...-2...-3...-1....4....0....2...-1...-4....0...-5...-1...-4....2....4

..0....3....2...-4....3...-3....1....1....3....4...-5....2...-5...-3...-3....3

.-5....1....1....3...-2...-4....5....5...-5....0....2....3....0....2....5...-2

CROSSREFS

Sequence in context: A032365 A250315 A074423 * A297690 A268599 A250556

Adjacent sequences:  A199903 A199904 A199905 * A199907 A199908 A199909

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 11 2011

STATUS

approved

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Last modified October 25 22:20 EDT 2021. Contains 348256 sequences. (Running on oeis4.)