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A305595
Number of length-n cyclic ternary words containing no abelian cubes.
1
3, 6, 8, 15, 30, 67, 126, 261, 540, 1101, 2442
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OFFSET
1,1
COMMENTS
Two words are considered identical in the cyclic sense if one is a cyclic shift of the other.
An abelian cube is a word of the form x x' x'' where x' and x'' are permutations of x.
LINKS
Table of n, a(n) for n=1..11.
EXAMPLE
For n = 4 the a(4) = 15 such words are {0011, 0012, 0021, 0022, 0101, 0102, 0112, 0121, 0122, 0202, 0211, 0212, 0221, 1122, 1212}.
CROSSREFS
Sequence in context:
A352507
A117148
A343272
*
A320687
A340494
A039567
Adjacent sequences:
A305592
A305593
A305594
*
A305596
A305597
A305598
KEYWORD
nonn
,
more
AUTHOR
Jeffrey Shallit
, Jun 05 2018
STATUS
approved
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Last modified September 17 05:28 EDT 2024. Contains 375985 sequences. (Running on oeis4.)