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A251339
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Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3
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1
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13275, 189129, 3014066, 55048995, 1151715397, 27005232676, 687109914883, 18427859055437, 510268616367258, 14398478349467699, 410803016154228437, 11796821936379895236, 340059287206039260739, 9824866995580418794877
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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 41 (see link above)
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EXAMPLE
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Some solutions for n=2
..0..1..2..1..1....2..2..3..3..3....0..0..0..1..3....0..0..2..0..0
..2..0..3..0..1....2..0..1..2..1....3..0..3..2..3....1..2..2..2..1
..3..1..2..1..1....2..2..3..3..3....3..0..0..1..3....0..3..2..3..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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