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A215072 Number of squarefree words of length n in a 6-ary alphabet, with new values 0..5 introduced in increasing order. 0
1, 1, 2, 4, 12, 40, 153, 638, 2825, 12938, 60458, 285664, 1358283, 6480694, 30979999, 148249768, 709832688, 3399805736, 16286469156, 78026226228, 373832145200, 1791120945112 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 5 of A215075.
LINKS
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....0....2....0....2....2....2
..3....1....0....3....0....3....3....0....3....0....2....0....2....3....0....3
..4....3....3....0....3....4....2....3....1....3....1....3....1....4....3....4
..3....2....0....2....2....5....0....0....2....0....3....4....2....2....4....2
..5....4....2....4....3....3....2....4....4....2....0....3....0....3....1....0
..0....3....4....3....4....4....1....3....5....4....1....2....1....0....0....2
..3....4....2....5....3....1....4....5....4....0....3....0....0....2....2....3
CROSSREFS
Cf. A215075.
Sequence in context: A119430 A074034 A268952 * A326513 A268953 A268954
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 02 2012
STATUS
approved

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Last modified February 28 22:27 EST 2024. Contains 370400 sequences. (Running on oeis4.)