The On-Line Encyclopedia of Integer Sequences (OEIS)

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A269655

Number of length-n 0..7 arrays with no adjacent pair x,x+1 repeated.
(history; published version)

#4 by R. H. Hardin at Wed Mar 02 11:30:00 EST 2016

STATUS

editing

approved

#3 by R. H. Hardin at Wed Mar 02 11:29:56 EST 2016

LINKS

R. H. Hardin, <a href="/A269655/b269655.txt">Table of n, a(n) for n = 1..210</a>

R. H. Hardin, <a href="/A269655/a269655.txt">Empirical recurrence of order 64</a>

#2 by R. H. Hardin at Wed Mar 02 11:29:22 EST 2016

NAME

allocated for R. H. Hardin

Number of length-n 0..7 arrays with no adjacent pair x,x+1 repeated.

DATA

8, 64, 512, 4089, 32600, 259476, 2061940, 16359580, 129599404, 1025145474, 8097221352, 63866100432, 503041727344, 3956869283864, 31083352671872, 243863266575744, 1910824354782112, 14954229427038576, 116893085869240608

OFFSET

1,1

COMMENTS

Column 7 of A269656.

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.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Mar 02 2016

STATUS

approved

editing

#1 by R. H. Hardin at Wed Mar 02 11:22:59 EST 2016

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved