HoldForm does not prevent evaluation

A few additional alternatives:

2^HoldForm /@ Range[0, 4]

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Table[With[{i = i}, HoldForm[2^i]], {i, 0, 4}]

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I believe this

Table[HoldForm[2^n]/.n->i,{i,0,4}]

gives you your result in the form you wish

Pure function work.

HoldForm[2^#] & /@ Range[0, 10]

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