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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
OFFSET
1,1
COMMENTS
Subdiagonal 7 of A268956.
LINKS
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: A353143 A201309 A049003 * A196422 A351508 A248703
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 16 2016
STATUS
approved