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In order to give an explicit answer to this question for the enefit of future perusers, I copy my previous comment :
sage: G = CyclicPermutationGroup(4)
sage: t = G.character_table()
sage: t[1,3]-4*t[3,3]
-4*zeta4 - 1
sage: import numpy
sage: numpy.complex64((t[1,3]-4*t[3,3]))
(-1-4j)
HTH,
