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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
OFFSET
1,1
REFERENCES
A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 73-82.
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.
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