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A265175 Number of nX3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal and vertical neighbors by a power of two. 1
1, 21, 2024, 170970, 7796840, 1346956387, 226158945148, 16064538255326, 2727481849960472, 241831690436276658, 46326258129266431511, 5463137744818812207086, 939106595874317262360608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A265178.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..194

EXAMPLE

Some solutions for n=4

..0..2..3....0..1..0....0..4..3....0..8..6....0..2..6....0..4..5....0..1..2

..2..3..7....1..3..1....8..6..5....8..6..2....2..3..5....8..6..4....4..5..1

..4..5..9....3.11..3....9..5..7....4..8.10....6..7..3....9..7..3....3..7..3

..2..3.11....2..3.11....8..7.11....5..9.11....7..3.11....8..9.11....2..3.11

CROSSREFS

Cf. A265178.

Sequence in context: A163928 A243685 A221122 * A300577 A304643 A153848

Adjacent sequences:  A265172 A265173 A265174 * A265176 A265177 A265178

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 03 2015

STATUS

approved

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Last modified October 21 04:00 EDT 2021. Contains 348141 sequences. (Running on oeis4.)