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A265921 Number of nXn 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique. 0
5, 340, 17936, 542940, 8821464, 112139348, 1135042936, 15078628680, 249568483336, 2294594493868, 25866958553904 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A265928.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A265928.

Sequence in context: A029495 A086900 A200002 * A203684 A124477 A059839

Adjacent sequences:  A265918 A265919 A265920 * A265922 A265923 A265924

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2015

STATUS

approved

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Last modified November 21 16:04 EST 2019. Contains 329371 sequences. (Running on oeis4.)