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 A305595 Number of length-n cyclic ternary words containing no abelian cubes. 0
 3, 6, 8, 15, 30, 67, 126, 261, 540, 1101, 2442 (list; graph; refs; listen; history; text; internal format)
 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 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: A143869 A165298 A117148 * 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 June 23 18:45 EDT 2021. Contains 345402 sequences. (Running on oeis4.)