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A269683
Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by plus or minus one modulo n+1.
1
2, 9, 64, 615, 7584, 114205, 2031072, 41651631, 967466240, 25102071621, 719516990160, 22578674361815, 769853562649248, 28340118309069645, 1120229004620264896, 47322526714956795615, 2127582051231624604416
OFFSET
1,1
COMMENTS
Diagonal of A269690.
LINKS
EXAMPLE
Some solutions for n=6
..1. .1. .6. .1. .5. .0. .0. .5. .4. .2. .2. .4. .2. .0. .6. .4
..5. .5. .3. .0. .1. .2. .2. .2. .5. .2. .3. .3. .0. .2. .1. .6
..3. .3. .4. .4. .0. .3. .0. .2. .5. .5. .5. .4. .6. .4. .6. .4
..6. .4. .4. .3. .5. .4. .6. .2. .0. .6. .3. .3. .3. .4. .3. .0
..5. .2. .1. .1. .0. .5. .4. .3. .3. .3. .1. .4. .0. .0. .6. .1
..2. .3. .0. .3. .5. .5. .6. .2. .5. .6. .0. .4. .4. .5. .5. .0
CROSSREFS
Cf. A269690.
Sequence in context: A269612 A269577 A268104 * A331658 A269487 A179199
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 03 2016
STATUS
approved