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A269612
Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1.
1
2, 9, 64, 612, 7440, 110099, 1923796, 38800210, 887591878, 22714070251, 643030722208, 19954247152834, 673552866591198, 24570545121277999, 963253518328620796, 40387590591059009524, 1803427358679591518028
OFFSET
1,1
COMMENTS
Diagonal of A269619.
LINKS
EXAMPLE
Some solutions for n=6
..5. .1. .4. .0. .0. .5. .0. .1. .2. .0. .0. .1. .2. .6. .1. .6
..0. .3. .6. .0. .3. .1. .6. .0. .1. .2. .2. .2. .0. .2. .3. .4
..6. .5. .1. .4. .6. .1. .6. .6. .4. .5. .5. .2. .1. .0. .4. .2
..1. .2. .0. .1. .1. .1. .2. .0. .4. .1. .6. .4. .6. .1. .3. .3
..6. .2. .1. .5. .3. .6. .3. .4. .4. .0. .2. .0. .0. .0. .2. .4
..1. .5. .1. .6. .0. .1. .2. .2. .6. .6. .1. .5. .6. .4. .2. .4
CROSSREFS
Cf. A269619.
Sequence in context: A368291 A113882 A059281 * A269577 A268104 A269683
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2016
STATUS
approved