−15,−17,−19,−21,? -15,-17,-19,-21,\text{?} −15,−17,−19,−21,?
−23 -23 −23
−20 -20 −20
1,0,−1,−2,−3,−4,? 1,0,-1,-2,-3,-4,\text{?} 1,0,−1,−2,−3,−4,?
−5 -5 −5
−7 -7 −7
10,−10,−30,? 10,-10,-30,\text{?} 10,−10,−30,?
−30 -30 −30
−50 -50 −50
−16,−22,−28,−34,? -16,-22,-28,-34,\text{?} −16,−22,−28,−34,?
−36 -36 −36
−40 -40 −40