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A269205
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Number of 5 X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
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1
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1024, 132300, 8314020, 555862380, 34838403756, 2135938293684, 128136007344516, 7568312936979972, 441444334269067260, 25489789190515708236, 1459585457554075237908, 82994548126187965994148
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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 52 (see link above).
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EXAMPLE
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Some solutions for n=2
..1..3. .1..0. .1..3. .1..0. .2..2. .1..3. .1..0. .0..2. .1..0. .2..2
..1..3. .3..3. .3..1. .0..2. .3..2. .1..1. .2..0. .0..2. .1..0. .0..0
..2..0. .3..3. .0..3. .2..0. .2..3. .0..1. .2..0. .2..1. .1..3. .1..3
..1..0. .3..2. .1..0. .2..3. .2..3. .0..0. .0..3. .3..3. .1..3. .1..3
..0..2. .0..2. .0..0. .2..0. .3..1. .2..0. .1..0. .3..1. .3..1. .2..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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