A378558 - OEIS

A378558

Powers of 4 that do not include the digit 4.

1, 16, 256, 65536, 16777216, 1099511627776

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OFFSET

1,2

COMMENTS

Any additional terms have an exponent of at least 10^5.

LINKS

MATHEMATICA

Select[4^Range[0, 100000], Not[MemberQ[IntegerDigits[#], 4]]&]

Select[4^Range[0, 500], DigitCount[#, 10, 4]==0&] (* Harvey P. Dale, Sep 25 2025 *)

CROSSREFS

KEYWORD

nonn,base,hard,more

AUTHOR

STATUS

approved