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A035060
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Numbers k such that 2^k does not contain the digit 5 (probably finite).
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1
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0, 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 17, 18, 22, 23, 24, 26, 27, 30, 31, 32, 34, 36, 38, 43, 46, 55, 62, 65, 66, 71
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OFFSET
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1,3
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LINKS
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MATHEMATICA
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Join[{0}, Select[Range@10000, FreeQ[IntegerDigits[2^#], 5] &]] (* Vincenzo Librandi, May 07 2015 *)
Select[Range[0, 80], DigitCount[2^#, 10, 5]==0&] (* Harvey P. Dale, Dec 24 2018 *)
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PROG
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(Magma) [n: n in [0..1000] | not 5 in Intseq(2^n) ]; // Vincenzo Librandi, May 07 2015
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CROSSREFS
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Cf. similar sequences listed in A035064.
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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