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A007977 Modified de Bruijn sequences: max. length of binary necklace in which no n-bit word appears twice. 0
1, 4, 6, 13, 20, 39, 70 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Index entries for sequences related to necklaces

CROSSREFS

Sequence in context: A191137 A069061 A088811 * A013122 A012964 A120463

Adjacent sequences:  A007974 A007975 A007976 * A007978 A007979 A007980

KEYWORD

nonn

AUTHOR

wds(AT)research.nj.nec.com (Warren Smith)

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Last modified February 14 16:48 EST 2012. Contains 205635 sequences.