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A269487
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Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by one.
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1
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2, 9, 64, 617, 7616, 114695, 2039274, 41805237, 970685708, 25177153349, 721451342084, 22633337514825, 771536819904130, 28396264745292221, 1122246922078022962, 47400301233243564613, 2130783065991229960608
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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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EXAMPLE
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Some solutions for n=6
..1. .1. .1. .0. .3. .2. .3. .0. .4. .3. .4. .3. .0. .4. .3. .3
..5. .4. .5. .4. .3. .2. .2. .2. .1. .5. .6. .3. .5. .6. .5. .3
..0. .6. .2. .3. .1. .2. .2. .0. .5. .2. .3. .0. .3. .1. .0. .2
..5. .0. .1. .2. .1. .4. .3. .1. .4. .0. .5. .2. .1. .5. .4. .4
..2. .0. .5. .6. .1. .2. .0. .4. .1. .0. .0. .3. .3. .6. .3. .6
..1. .2. .3. .1. .2. .1. .1. .1. .1. .1. .0. .2. .1. .6. .3. .1
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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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