Ruby, 56 bytes

->n{d=[];v=0;n.times{|i|d<<v+=v<i||(d-[v-i]!=d)?i:-i};d}

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Commented:

->n{ ... }                         # lambda function taking an integer
  d=[];v=0                         # initialize list of sequence values d and previous value v
  n.times{|i| ... }                # run the following code for i = 0,1,...,n-1:
          v<i||(d-[v-i]!=d)?i:-i   #   i IF (v < i OR v-i in d) ELSE -i
       v+=                         #   add this to v
    d<<                            #   and append the new value of v to d
  d                                # return d