A266048 - OEIS

A266048

Number of n X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.

1, 7, 20, 4203, 27764427, 162959704686, 7819198018954698, 8592495369531464281394, 61644092749139641953624493469, 2207027264659323985934603717331920405

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OFFSET

1,2

COMMENTS

Diagonal of A266055.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

EXAMPLE

Some solutions for n=4

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

..2..1..4..0....2..0..3..0....0..4..2..0....0..4..2..0....2..1..4..0

..0..3..1..2....1..4..2..2....0..4..2..0....0..4..3..0....0..3..2..2

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

CROSSREFS

Cf. A266055.

Sequence in context: A300308 A344849 A216457 * A233331 A158280 A201072

Adjacent sequences: A266045 A266046 A266047 * A266049 A266050 A266051

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved