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A251347
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Number of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5
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1
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11709, 663307, 39019417, 2324761359, 139048718681, 8328173688589, 499036482452523, 29907963638879071, 1792532136871875085, 107437636306908032001, 6439458920181575157103, 385961148453732028388159
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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 60 (see link above)
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EXAMPLE
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Some solutions for n=1
..1..0..0..1..1....2..1..1..1..1....2..0..2..0..0....2..0..1..2..0
..0..2..2..0..1....0..2..1..0..1....0..1..1..1..2....0..1..1..1..0
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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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