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A265983 Number of 3Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself. 1
1, 123, 1267, 11573, 320641, 8061815, 133236904, 2362292183, 49521535540, 1008039449030, 19153337324312, 370373113285491, 7361128495277353, 145077471406639845, 2828271548979912832, 55370542134158497160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A265981.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A265981.

Sequence in context: A233119 A174173 A116935 * A103504 A324627 A259907

Adjacent sequences:  A265980 A265981 A265982 * A265984 A265985 A265986

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2015

STATUS

approved

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Last modified July 27 05:04 EDT 2021. Contains 346305 sequences. (Running on oeis4.)