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A035062
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Numbers n such that 2^n does not contain the digit 7.
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0
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 22, 23, 25, 28, 33, 41, 42, 49, 50, 54, 61, 71
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| It is conjectured that 71 is the last term.
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MATHEMATICA
| Select[ Range@10000, FreeQ[ IntegerDigits[2^# ], 7] &] - Shyam Sunder Gupta (guptass(AT)rediffmail.com), Sep 01 2007
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CROSSREFS
| Cf. A007377, A034293.
Sequence in context: A179892 A061773 A125007 * A032964 A033066 A017907
Adjacent sequences: A035059 A035060 A035061 * A035063 A035064 A035065
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KEYWORD
| nonn,base,fini
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 1998.
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), May 21 2008 at the suggestion of R. J. Mathar
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