OFFSET
1,4
COMMENTS
Remarkably, these partial sums appear to have several periods of length 153008. This sum is not discussed by O'Bryant et al.
LINKS
T. D. Noe, Table of n, a(n) for n=1..40000
T. D. Noe, Plot of 10^6 terms
Kevin O'Bryant, Bruce Reznick and Monika Serbinowska, Almost alternating sums, arXiv:math/0308087 [math.NT], 2003-2005.
Kevin O'Bryant, Bruce Reznick and Monika Serbinowska, Almost alternating sums, Amer. Math. Monthly, Vol. 113 (October 2006), 673-688.
MATHEMATICA
Rest[FoldList[Plus, 0, (-1)^Floor[2^(1/3)*Range[120]]]]
Accumulate[(-1)^Floor[Range[100]Surd[2, 3]]] (* Harvey P. Dale, Apr 16 2015 *)
CROSSREFS
KEYWORD
AUTHOR
T. D. Noe, Oct 11 2006
STATUS
approved