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A215394 Number of length-n 0..n arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree"), and new values introduced in order 0..n. 0
1, 1, 1, 3, 6, 27, 99, 463, 2233, 11875, 66925, 402364, 2555606, 17115329, 120368115, 886510373, 6819231506 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Diagonal of A215401.
LINKS
EXAMPLE
Some solutions for n=6:
..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....0....0....2....2....2....2....2....0....2....2....0....2
..0....3....3....0....2....2....3....3....0....3....1....2....0....3....2....0
..2....2....1....3....0....3....4....0....3....0....0....3....3....1....1....1
..1....4....4....4....3....2....1....2....2....4....3....4....1....2....3....3
CROSSREFS
Sequence in context: A215398 A215399 A215400 * A222625 A060170 A223143
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Aug 09 2012
STATUS
approved

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)