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A269655 Number of length-n 0..7 arrays with no adjacent pair x,x+1 repeated. 1
8, 64, 512, 4089, 32600, 259476, 2061940, 16359580, 129599404, 1025145474, 8097221352, 63866100432, 503041727344, 3956869283864, 31083352671872, 243863266575744, 1910824354782112, 14954229427038576, 116893085869240608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A269656.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 64

FORMULA

Empirical recurrence of order 64 (see link above)

EXAMPLE

Some solutions for n=5

..1. .4. .4. .0. .2. .2. .2. .7. .0. .3. .6. .4. .5. .3. .1. .0

..1. .3. .4. .3. .2. .2. .7. .0. .3. .1. .5. .5. .5. .1. .6. .7

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

..4. .2. .4. .1. .2. .2. .3. .7. .3. .6. .4. .6. .4. .1. .1. .5

..0. .6. .4. .7. .3. .6. .1. .3. .1. .2. .0. .7. .1. .5. .3. .0

CROSSREFS

Cf. A269656.

Sequence in context: A269689 A269493 A269775 * A250360 A190130 A125908

Adjacent sequences:  A269652 A269653 A269654 * A269656 A269657 A269658

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2016

STATUS

approved

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Last modified December 4 15:14 EST 2021. Contains 349526 sequences. (Running on oeis4.)