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A233993
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Number of (n+1)X(4+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18
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1
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17156, 51026, 150572, 560408, 2021016, 9191620, 39038268, 213791308, 1031265884, 6478189956, 33941673948, 230895962640, 1269494065360, 8976203094604, 50758367608856, 364579538686824, 2098173723540476, 15134353956170396
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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
..3..5..0..5..6....1..5..6..1..1....5..4..6..1..6....2..0..1..0..1
..0..0..3..0..5....6..2..1..4..6....0..1..1..4..1....2..6..1..6..1
..0..6..3..6..5....1..5..6..1..1....5..4..6..1..6....5..1..4..1..0
..1..1..6..1..2....6..2..1..0..6....1..0..4..1..0....2..6..1..6..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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