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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
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: A167231 A174173 A116935 * A103504 A324627 A259907
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2015
STATUS
approved

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Last modified June 23 14:31 EDT 2024. Contains 373651 sequences. (Running on oeis4.)