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A268961 Number of length-(n+7) 0..n arrays with no repeated value equal to the previous repeated value, with new values introduced in sequential order. 1
23, 1361, 24714, 272738, 2355975, 18146537, 134520386, 1002621328, 7680218714, 60997066270, 503350821180, 4313327580676, 38328122520204, 352617973045358, 3353662534979250, 32927372167566264, 333319728382967773 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subdiagonal 7 of A268956.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..115

EXAMPLE

Some solutions for n=3

..0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0

..1. .1. .1. .1. .1. .1. .1. .1. .0. .1. .1. .1. .1. .1. .1. .0

..1. .2. .2. .2. .2. .0. .2. .2. .1. .0. .2. .0. .1. .0. .0. .1

..2. .0. .3. .3. .2. .0. .3. .0. .0. .2. .0. .0. .2. .2. .2. .2

..1. .2. .2. .1. .0. .2. .2. .3. .2. .2. .2. .1. .1. .3. .2. .0

..0. .0. .1. .1. .1. .2. .1. .0. .2. .3. .0. .2. .0. .0. .3. .3

..1. .1. .0. .0. .3. .1. .1. .0. .0. .1. .0. .0. .3. .2. .0. .0

..2. .1. .3. .0. .3. .2. .2. .2. .2. .0. .2. .1. .2. .3. .0. .3

..2. .2. .3. .1. .2. .0. .2. .3. .1. .1. .0. .2. .2. .2. .3. .3

..0. .2. .2. .1. .3. .3. .3. .0. .3. .0. .1. .3. .3. .1. .2. .0

CROSSREFS

Cf. A268956.

Sequence in context: A100768 A201309 A049003 * A196422 A248703 A264903

Adjacent sequences:  A268958 A268959 A268960 * A268962 A268963 A268964

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 2016

STATUS

approved

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Last modified March 4 02:14 EST 2021. Contains 341773 sequences. (Running on oeis4.)