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A064565
Reciprocal of n terminates with an infinite repetition of digit 6. Multiples of 10 are omitted.
6
6, 15, 24, 96, 375, 384, 1536, 6144, 9375, 24576, 98304, 234375, 393216, 1572864, 5859375, 6291456, 25165824, 100663296, 146484375, 402653184, 1610612736, 3662109375, 6442450944, 25769803776, 91552734375, 103079215104
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 3*2^(2i+1) and 3*5^(2i+1) [i >= 0].
EXAMPLE
1/6291456 = 0.0000001589457194010416666666666...
MATHEMATICA
Module[{r5=20, r2}, r2=Ceiling[r5*Log[2, 5]]; Flatten[{3*2^Range[ 1, r2, 2], 3*5^Range[ 1, r5, 2]}]]//Sort (* Harvey P. Dale, Oct 15 2017 *)
PROG
(ARIBAS): a064560(1, 500000000, 6, 36). For definition of a064560 see A064560.
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Sep 20 2001
EXTENSIONS
More terms from Klaus Brockhaus, Sep 21 2001
Further terms from James A. Sellers, Sep 28 2001
STATUS
approved