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A018781 Duplicate of A003523. 0
1, 3, 11, 31, 33, 93, 341, 1023 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A009131 A003554 A003523 * A119215 A057172 A071568

Adjacent sequences:  A018778 A018779 A018780 * A018782 A018783 A018784

KEYWORD

dead

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Last modified February 17 07:30 EST 2012. Contains 205998 sequences.