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A267544 Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west or southeast neighbor modulo n and the upper left element equal to 0. 0
1, 0, 1, 27, 555, 24981, 1825761, 184975696, 24714858112, 4188322485532, 875632389820566 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Column 2 of A267546.
LINKS
EXAMPLE
Some solutions for n=4
..0..2....0..2....0..2....0..2....0..2....0..3....0..2....0..2....0..3....0..3
..2..1....3..1....0..2....0..2....3..1....2..1....3..2....3..1....2..1....3..1
..1..0....2..1....3..1....3..1....3..1....0..3....1..1....1..0....1..3....2..1
..3..3....0..3....3..1....1..3....2..0....2..1....0..3....3..2....0..2....2..0
CROSSREFS
Cf. A267546.
Sequence in context: A051561 A163197 A347591 * A061914 A076008 A232944
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2016
STATUS
approved

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Last modified April 13 02:05 EDT 2024. Contains 371639 sequences. (Running on oeis4.)