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A267554 Number of nX(n+1) arrays of permutations of n+1 copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0. 0
1, 10, 20, 61, 287, 2041, 21781, 345853, 8152191, 287657725 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Superdiagonal 1 of A267553.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267553.

Sequence in context: A271512 A294473 A174183 * A131726 A276764 A215878

Adjacent sequences:  A267551 A267552 A267553 * A267555 A267556 A267557

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2016

STATUS

approved

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Last modified February 20 16:25 EST 2018. Contains 299380 sequences. (Running on oeis4.)