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A267900 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0. 0
1, 11, 268, 17658, 1696920, 273460560, 59383337040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A267901.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267901.

Sequence in context: A027019 A255955 A285051 * A168147 A108519 A160195

Adjacent sequences:  A267897 A267898 A267899 * A267901 A267902 A267903

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2016

STATUS

approved

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Last modified December 13 08:08 EST 2019. Contains 329968 sequences. (Running on oeis4.)