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A067068 n* - 2^n, where n* (A003418) = least common multiple of the numbers [1,...,n]. 1
-1, -2, -2, -4, 28, -4, 292, 584, 2008, 1496, 25672, 23624, 352168, 343976, 327592, 655184, 12121168, 11990096, 232268272, 231743984, 230695408, 228598256, 5345840272, 5337451664, 26737589968, 26704035536, 80179215472, 80044997744 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

It is known that this sequence is nonnegative for n >= 7. This can be established using the methods used to show A059794 is nonnegative - Carl Pomerance, Bell Labs, Feb 16, 2002

CROSSREFS

Cf. A059794.

Sequence in context: A049147 A189879 A189870 * A032334 A032082 A088895

Adjacent sequences:  A067065 A067066 A067067 * A067069 A067070 A067071

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Feb 17 2002

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.