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A266823 Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west, northwest or southwest neighbor modulo n and the upper left element equal to 0. 0
1, 0, 0, 1, 86, 4701, 378116, 41728537, 5954780104, 1062483996748, 231414064262143 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
Column 2 of A266825.
LINKS
EXAMPLE
Some solutions for n=5
..0..3....0..0....0..2....0..2....0..4....0..2....0..0....0..0....0..2....0..2
..0..3....2..2....4..4....4..2....4..3....0..4....2..4....2..2....2..0....2..4
..4..2....4..4....1..3....4..1....3..1....4..2....1..1....4..1....1..4....4..1
..2..1....1..1....3..1....1..3....2..1....3..1....4..3....1..3....4..3....1..3
..4..1....3..3....2..0....0..3....2..0....3..1....3..2....4..3....3..1....3..0
CROSSREFS
Cf. A266825.
Sequence in context: A035738 A017749 A319134 * A262471 A223739 A223722
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 04 2016
STATUS
approved

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Last modified May 23 17:39 EDT 2024. Contains 372765 sequences. (Running on oeis4.)