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A269460 Number of length-n 0..n arrays with no repeated value equal to the previous repeated value. 1
2, 9, 60, 580, 7170, 108402, 1934856, 39808584, 927352710, 24123618310, 693066874236, 21793557008028, 744461976979994, 27451268150267850, 1086741065393740560, 45971289976043485456, 2069440771476789080334 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A269467.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..193

EXAMPLE

Some solutions for n=6

..2. .5. .2. .3. .4. .0. .4. .2. .6. .5. .0. .0. .1. .6. .4. .5

..0. .2. .0. .6. .4. .6. .6. .3. .3. .3. .3. .3. .5. .4. .6. .1

..0. .3. .2. .2. .3. .3. .0. .3. .5. .6. .6. .5. .5. .2. .3. .5

..2. .6. .1. .6. .5. .5. .5. .6. .5. .4. .3. .1. .2. .2. .5. .0

..2. .3. .5. .2. .3. .6. .0. .5. .6. .1. .4. .0. .2. .6. .4. .1

..6. .1. .5. .4. .2. .2. .0. .1. .3. .2. .3. .3. .3. .3. .4. .5

CROSSREFS

Cf. A269467.

Sequence in context: A269672 A268205 A269600 * A207649 A289713 A053983

Adjacent sequences:  A269457 A269458 A269459 * A269461 A269462 A269463

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 2016

STATUS

approved

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Last modified October 20 18:08 EDT 2018. Contains 316401 sequences. (Running on oeis4.)