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A269493 Number of length-n 0..7 arrays with no repeated value differing from the previous repeated value by one. 1
8, 64, 512, 4082, 32460, 257536, 2039274, 16120298, 127240496, 1003029086, 7897819380, 62124999480, 488250966838, 3834268407348, 30090123746866, 235994522394958, 1849892639767268, 14493867039521420, 113511139403772878 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A269494.

LINKS

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

FORMULA

Empirical: a(n) = 35*a(n-1) -483*a(n-2) +3234*a(n-3) -9950*a(n-4) +7266*a(n-5) +16356*a(n-6) +1169*a(n-7) -487*a(n-8) -21*a(n-9)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A269494.

Sequence in context: A269582 A269434 A269689 * A269775 A269655 A250360

Adjacent sequences:  A269490 A269491 A269492 * A269494 A269495 A269496

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 28 2016

STATUS

approved

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Last modified October 28 07:43 EDT 2021. Contains 348321 sequences. (Running on oeis4.)