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Search: id:A027871
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A027871 Product(3^i - 1), i=1..n. +0
1
1, 2, 16, 416, 33280, 8053760, 5863137280, 12816818094080, 84078326697164800, 1654829626053597593600, 97714379759212830706892800, 17309711516825516108403231948800 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A012388 A012752 A130276 this_sequence A009397 A009700 A012030

Adjacent sequences: A027868 A027869 A027870 this_sequence A027872 A027873 A027874

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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