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A123739 Partial sums of (-1)^floor(n*e). 4
1, 0, 1, 2, 1, 2, 1, 0, 1, 0, -1, 0, -1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, -1, 0, -1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000

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[E*Range[120]]]]

CROSSREFS

Cf. A123724 (sum for 2^(1/3)), A123737 (sum for sqrt(2)), A123738 (sum for pi).

Sequence in context: A234694 A091704 A175799 * A165575 A165582 A165472

Adjacent sequences:  A123736 A123737 A123738 * A123740 A123741 A123742

KEYWORD

easy,sign

AUTHOR

T. D. Noe, Oct 11 2006

STATUS

approved

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Last modified February 21 22:56 EST 2018. Contains 299427 sequences. (Running on oeis4.)