assuming you mean the decimal expansion and a length-3 de bruijn sequence on 10 symbols, I am not seeing it. There seem to be many sub-sequences which do not appear. (assuming that python's Decimal library at a precision of 4000 digits is actually giving the first 1000 digits correctly; though I have no reason to doubt this I don't know for sure the maximum ULP error of exponent)
Python 3.11.2 (main, Sep 14 2024, 03:00:30) [GCC 12.2.0] on linux
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>>> from decimal import Decimal, getcontext
>>> getcontext().prec = 4000
>>> d = 17 ** (1 / Decimal(7))
>>> sd = str(d)
>>> sd[:12]
'1.4989198720'
>>> s = sd[2:][:1000]
>>> s[:10], s[-10:]
('4989198720', '6163659068')
>>> [i for i in range(1000) if "%03d" % i not in s+s]
[0, 2, 4, 5, 9, [...], 993, 994, 995, 998, 999]
>>> len(_)
361
