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A252141
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Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7
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1
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1921, 3026, 5090, 8132, 14578, 24855, 44707, 79081, 140896, 248042, 450225, 808657, 1449166, 2601931, 4715098, 8501478, 15355964, 27807534, 50383383, 91201345, 165535742, 300252624, 544823562, 989531463, 1797603881, 3264756294
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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 96 (see link above)
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EXAMPLE
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Some solutions for n=4
..0..2..3....1..2..0....0..2..3....0..2..1....1..2..3....2..2..1....2..2..2
..3..2..0....3..0..3....3..1..1....3..1..2....2..1..0....3..3..1....0..3..0
..3..3..0....2..3..0....0..3..3....0..3..0....0..3..0....0..0..3....3..1..3
..1..2..3....2..0..3....0..3..3....3..1..3....1..2..3....3..3..1....0..3..0
..2..1..3....1..2..0....3..1..1....0..3..0....2..1..2....3..2..1....3..1..3
..0..3..0....3..3..0....0..2..1....2..2..3....0..3..0....1..2..3....0..2..3
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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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