

A073419


Worthless numbers: numbers without h, o, r, t, or w.


0



5, 6, 7, 9, 11, 55555, 66666, 77777, 99999, 555555, 666666, 777777, 999999, 5555555, 6666666, 7777777, 9999999, 555555555, 666666666, 777777777, 999999999, 1111111111, 55555555555, 66666666666, 77777777777, 99999999999
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OFFSET

1,1


COMMENTS

Of course there cannot be any number that is expressed in any of the usual ways without w, o, r, t or h, between eleven and a googol. "Twelve and the teens and ties, factorials" all contains at least one "t". Powers all contain "tothe". "Score" or "dozen" or "gross" contain at least an "o". "Hundred" and "thousand" contain at least an "h" and "illion" contains an "o". Reading digitbydigit would lead to the duller sequence: 5, 6, 7, 9, 55, 56, 57, 59 and exclude that very worthless number, fiveelevens.  Michael Joseph Halm, May 05 2006


REFERENCES

M. J. Halm, Sequences (Re)discovered, Mpossibilities 81 (Aug. 2002).


LINKS

Table of n, a(n) for n=1..26.


EXAMPLE

a(1) = 5 because 5 is the first integer without an h, o, r, t or w.
a(6) = 55555 is the sixth worthless number, read as sixfives


CROSSREFS

Sequence in context: A287087 A180939 A229231 * A072956 A241203 A279001
Adjacent sequences: A073416 A073417 A073418 * A073420 A073421 A073422


KEYWORD

easy,nonn,word,base


AUTHOR

Michael Joseph Halm, Aug 23 2002; corrected May 05 2006


EXTENSIONS

More terms from Michael Joseph Halm, May 05 2006


STATUS

approved



