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A265927
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Number of nX7 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.
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1
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17012, 1119424, 3883480, 13716476, 53801792, 238485164, 1135042936, 5759992224, 29783744648, 159386938728, 851999276304, 4668283409720, 25354240124600, 140755677796776, 771872865387920, 4322800211903112, 23867120132045176
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical recurrence of order 48 (see link above)
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EXAMPLE
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Some solutions for n=1
..1..1..4..4..0..0..4....1..1..3..3..0..1..1....0..2..3..3..2..0..4
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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