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A252217
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Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7
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1
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8178, 17478, 122694, 801122, 5218112, 34351865, 225314934, 1478226841, 9717153336, 63795462270, 418649646795, 2748809210565, 18049979172089, 118504214119716, 778005088796709, 5108005033209826, 33536938748133042
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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 74 (see link above)
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EXAMPLE
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Some solutions for n=3
..3..3..3..3..3..3..3..3....2..1..1..1..1..1..1..1....1..1..1..2..1..1..1..1
..2..3..3..2..3..3..3..3....1..1..1..1..2..1..1..1....2..1..1..1..1..1..1..1
..3..3..3..3..3..3..3..2....1..2..1..1..1..1..1..2....1..1..1..1..1..1..1..2
..3..3..3..3..3..3..3..3....1..1..1..2..1..1..1..1....1..2..1..1..1..1..1..1
..3..2..3..3..2..3..3..3....2..1..1..1..1..1..2..1....1..1..1..2..1..1..1..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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