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 A215074 Number of squarefree words of length n in an 8-ary alphabet, with new values 0..7 introduced in increasing order 0
 1, 1, 2, 4, 12, 40, 154, 660, 3113, 15893, 86857, 502092, 3036032, 19006591, 122119857, 799665333, 5308126648, 35576413852, 240063646519, 1627605038848 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Column 7 of A215075. LINKS Table of n, a(n) for n=1..20. EXAMPLE Some solutions for n=9: ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0 ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1 ..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2 ..3....0....1....3....1....3....3....1....3....3....0....3....1....1....3....0 ..4....3....3....4....3....4....4....3....4....0....3....4....3....3....4....3 ..0....1....1....5....4....5....1....0....2....2....4....5....4....0....0....4 ..3....4....0....4....0....4....5....4....5....4....5....6....0....1....1....0 ..1....2....4....0....2....1....3....2....0....5....1....7....5....0....0....5 ..2....0....1....6....3....2....0....5....1....4....6....2....1....3....5....2 CROSSREFS Sequence in context: A268955 A268010 A215073 * A215070 A188479 A062962 Adjacent sequences: A215071 A215072 A215073 * A215075 A215076 A215077 KEYWORD nonn AUTHOR R. H. Hardin Aug 02 2012 STATUS approved

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Last modified December 1 23:26 EST 2023. Contains 367503 sequences. (Running on oeis4.)