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A252073
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Number of (n+2)X(6+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4
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1
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1573, 8352, 60245, 391934, 2547765, 16789564, 110131513, 722619033, 4749948377, 31181555206, 204626875063, 1343622742626, 8822820748320, 57923805951945, 380282422081555, 2496764092390189, 16392666023439258, 107625734028805523
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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 72 (see link above)
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EXAMPLE
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Some solutions for n=3
..1..2..2..2..1..2..2..1....2..1..2..2..2..2..1..2....1..2..2..2..2..2..2..2
..2..2..1..2..2..2..2..2....1..2..2..2..1..2..2..2....2..2..2..2..2..2..2..1
..2..2..2..2..2..2..2..2....2..2..2..2..2..2..2..2....2..2..2..1..2..2..2..2
..2..1..2..2..2..2..2..2....2..2..2..1..2..2..2..2....2..2..2..2..2..2..2..2
..2..2..2..2..2..2..1..2....1..2..2..2..2..2..2..2....2..2..2..2..1..2..2..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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