A360623 Largest k such that the decimal representation of 2^k is missing any n-digit string.
168, 3499, 53992, 653060
Offset: 1
Examples
168 is the largest base-ten power of 2 that is missing any of the 10 length-1 digit-strings (missing '2'). 3499 is the largest base-ten power of 2 that is missing any of the 100 length-2 digit-strings (missing '95'). 53992 is the largest base-ten power of 2 that is missing any of the 1000 length-3 digit-strings (missing '661'). 653060 is the largest base-ten power of 2 that is missing any of the 10000 length-4 digit-strings (missing '6164').
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