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A098980 Duplicate of A007647. 0
1, 3, 9, 21, 363, 2161, 4839, 49521, 105994 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A193374 A191998 A007647 * A063586 A131477 A002128

Adjacent sequences:  A098977 A098978 A098979 * A098981 A098982 A098983

KEYWORD

dead

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Last modified February 13 15:16 EST 2012. Contains 205519 sequences.