Example : 22738 is in the sequence, because
The digit 1 doesn't appear in 22738^1
The digit 2 doesn't appear in 22738^2 = 517016644
The digit 3 doesn't appear in 22738^3 = 11755924451272
The digit 4 doesn't appear in 22738^4 = 267306210173022736
The digit 5 doesn't appear in 22738^5 = 6078008606914190971168
The digit 6 doesn't appear in 22738^6 = 138201759704014874302417984
The digit 7 doesn't appear in 22738^7 = 3142431612149890211888380120192
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