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A112081 A112080(n)/2. 1
0, 1, -1, 0, 2, 0, 4, -1, 0, 0, 0, 6, -3, 0, 6, 0, 1, -1, 0, -3, 0, 9, -3, 0, 0, 0, 1, -3, 0, -2, 0, 1, -1, 0, 9, 0, 1, -1, 0, 12, 0, 3, -1, 0, 0, 0, 3, -4, 0, 2, 0, 1, -1, 0, -3, 0, 16, -3, 0, 0, 0, 1, -3, 0, -5, 0, 1, -1, 0, 14, 0, 1, -1, 0, 2, 0, 19, -1, 0, 0, 0, 3, -3, 0, 2, 0, 1, -1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..89.

CROSSREFS

Sequence in context: A285774 A262589 A019215 * A265158 A210444 A226949

Adjacent sequences:  A112078 A112079 A112080 * A112082 A112083 A112084

KEYWORD

sign

AUTHOR

Antti Karttunen, Aug 27 2005

STATUS

approved

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Last modified March 22 10:07 EDT 2019. Contains 321421 sequences. (Running on oeis4.)