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A085241
a(n) = A085239(n+1) - A085239(n).
0
1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 1, -1, 0, 1, -1, 0, 1, -1, 1, -1, 0, 1
OFFSET
1,1
CROSSREFS
Sequence in context: A005713 A188031 A305387 * A105368 A138019 A179850
KEYWORD
sign
AUTHOR
Reinhard Zumkeller, Jun 22 2003
STATUS
approved