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A266100
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Number of nX7 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself.
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1
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25, 680, 16103, 371130, 9880139, 240721036, 6206090116, 154469020054, 3932140956510, 98694163378141, 2499180663254917, 62938133863924662, 1590417698133685623, 40104786316082042055, 1012607062750588012145
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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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EXAMPLE
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Some solutions for n=3
..0..1..2..3..2..1..0....1..0..0..1..1..0..1....0..0..2..1..0..2..1
..2..1..2..1..2..0..0....1..1..1..1..0..2..0....0..1..1..1..1..0..0
..0..0..0..0..0..0..1....1..0..2..1..1..0..0....1..0..1..1..0..0..1
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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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