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A018905 Duplicate of A024537. 0
2, 4, 9, 21, 50, 120, 289, 697, 1682, 4060, 9801, 23661, 57122, 137904, 332929 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

CROSSREFS

Sequence in context: A101891 A119967 A052921 * A024537 A171842 A027826

Adjacent sequences:  A018902 A018903 A018904 * A018906 A018907 A018908

KEYWORD

dead

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Last modified February 16 20:59 EST 2012. Contains 205968 sequences.