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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

Robert Israel, Table of n, a(n) for n = 1..787

Index entries for sequences related to decimal expansion of 1/n

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

Cf. A064560, A064562, A064563, A064564, A064565, A064566, A064567.

Sequence in context: A178540 A351534 A296326 * A291177 A341568 A093761

Adjacent sequences:  A064558 A064559 A064560 * A064562 A064563 A064564

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 May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)