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A064561 Reciprocal of n terminates with an infinite repetition of digit 2. Multiples of 10 are omitted. 8
45, 288, 18432, 703125, 1179648, 75497472, 4831838208, 10986328125, 309237645312, 19791209299968, 171661376953125, 1266637395197952, 81064793292668928, 2682209014892578125, 5188146770730811392 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
REFERENCES
A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 73-82.
LINKS
FORMULA
Numbers of the form 9*2^(6i-1) and 9*5^(6i-5) [i>0].
EXAMPLE
1/1179648 = 0.000000847710503472222222222...
MAPLE
sort([seq(9*2^(6*i-1), i=1 .. floor((1+log[2](10^20/9))/6)),
seq(9*5^(6*i-5), i=1 .. floor((5+log[5](10^20/9))/6))]); # Robert Israel, May 03 2021
PROG
(ARIBAS): a064560(1, 300000000, 2, 36). For definition of a064560 see A064560.
CROSSREFS
Sequence in context: A178540 A351534 A296326 * A291177 A341568 A093761
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Sep 20 2001
EXTENSIONS
One more term from Klaus Brockhaus, Sep 22 2001
More terms from James A. Sellers, Sep 28 2001
STATUS
approved

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Last modified June 20 11:12 EDT 2024. Contains 373527 sequences. (Running on oeis4.)