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A133912
First differences of A007001.
2
1, 1, -1, 1, 1, -2, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, -1, 1, 1, -2, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, 1, 1, 1, -4, 1, -1, 1, 1, -2, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, -1, 1, 1, -2, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, 1, 1, 1, -4, 1, -1, 1, 1, -2, 1, -1, 1, 1, -2, 1, 1, 1, -3, 1, -1, 1, 1, -2, 1
OFFSET
1,6
EXAMPLE
a(5) = 1 = A007001(5) - A007001(4) = (3 - 2).
CROSSREFS
KEYWORD
sign
AUTHOR
Gary W. Adamson, Sep 28 2007
EXTENSIONS
More terms from Colin Barker, Apr 19 2015
STATUS
approved