I need to find equations of this list: $[1,1,1,0,0,0,1,1,1,0,0,0, ...]$ (it's periodic)
The closest equation I've got is $\left\lceil \sin (\frac{\pi}{3}x)\right\rceil $, which looks like this:
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But I need it to look like this:
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Can you help me?