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A265655 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0. 0
1, 2, 104, 39913, 35213302, 59232755329, 167960505022072 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A265656.

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

..0..1..2..3....0..1..2..0....0..1..2..0....0..1..0..1....0..1..0..2

..2..3..2..0....2..3..3..1....3..1..3..1....0..2..3..2....3..3..0..3

..1..1..2..0....1..0..0..1....2..2..0..0....3..2..3..2....1..1..1..2

..3..0..3..1....2..3..3..2....3..1..3..2....1..0..3..1....2..2..3..0

CROSSREFS

Cf. A265656.

Sequence in context: A281053 A101530 A199945 * A001184 A098653 A119433

Adjacent sequences:  A265652 A265653 A265654 * A265656 A265657 A265658

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 12 2015

STATUS

approved

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Last modified May 10 21:06 EDT 2021. Contains 343780 sequences. (Running on oeis4.)