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A266035 Number of 3Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than itself. 1
1, 55, 481, 5594, 121029, 2045306, 33026298, 562735444, 9532097947, 160132082576, 2699812308573, 45545430005680, 767636583946670, 12939677383177473, 218153972376875945, 3677676423588950515, 61997693315879549117 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A266033.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A266033.

Sequence in context: A145054 A166839 A166827 * A241699 A262103 A138053

Adjacent sequences:  A266032 A266033 A266034 * A266036 A266037 A266038

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified May 29 08:13 EDT 2022. Contains 354124 sequences. (Running on oeis4.)