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A265969 Number of nX4 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique. 1
340, 7656, 23920, 74248, 230784, 721864, 2263704, 7152956, 22522200, 71566116, 226074624, 720236752, 2280992736, 7276115664, 23077516368, 73669330232, 233938714232, 747052012824, 2374072906440, 7582196847884, 24110436293280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A265973.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A265973.

Sequence in context: A237959 A232514 A187383 * A265924 A239159 A222927

Adjacent sequences:  A265966 A265967 A265968 * A265970 A265971 A265972

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2015

STATUS

approved

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Last modified November 29 17:58 EST 2021. Contains 349416 sequences. (Running on oeis4.)