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A263667
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Number of (n+1)X(1+1) 0..6 arrays with each row and column divisible by 11, read as a base-7 number with top and left being the most significant digits.
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1
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3, 12, 57, 283, 1415, 7097, 35513, 177572, 887845, 4438957, 22194651, 110973054, 554865069, 2774325211, 13871626055, 69358131749, 346790660621, 1733953303574, 8669766516865, 43348832566369, 216744162822867, 1083720814100868
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OFFSET
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1,1
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COMMENTS
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Column 1 of A263672.
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 5*a(n-1) +67*a(n-10) -335*a(n-11)
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EXAMPLE
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Some solutions for n=4
..3..1....6..2....4..5....1..4....3..1....6..2....4..5....4..5....6..2....4..5
..6..2....6..2....6..2....3..1....4..5....4..5....0..0....3..1....3..1....1..4
..1..4....6..2....6..2....3..1....4..5....6..2....4..5....1..4....6..2....6..2
..1..4....0..0....4..5....6..2....1..4....6..2....0..0....4..5....0..0....1..4
..0..0....6..2....6..2....0..0....0..0....1..4....1..4....4..5....1..4....4..5
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CROSSREFS
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Cf. A263672.
Sequence in context: A106570 A027140 A110309 * A101106 A165310 A133158
Adjacent sequences: A263664 A263665 A263666 * A263668 A263669 A263670
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Oct 23 2015
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STATUS
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approved
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