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A070022 1/n has period 2 in base 10. 5
11, 22, 33, 44, 55, 66, 88, 99, 110, 132, 165, 176, 198, 220, 264, 275, 330, 352, 396, 440, 495, 528, 550, 660, 704, 792, 825, 880, 990, 1056, 1100, 1320, 1375, 1408, 1584, 1650, 1760, 1980, 2112, 2200, 2475, 2640, 2750, 2816, 3168, 3300, 3520, 3960, 4125 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) =11*A070023(n). Numbers of the form a*b*c where a is in {11, 33, 99}, b is a power of 2 and c is a power of 5.

EXAMPLE

176 is in the sequence since 1/176=0.00568181818181818...

MATHEMATICA

Select[Range[5000], Length[RealDigits[1/#][[1, -1]]]==2&] (* Harvey P. Dale, Oct 10 2011 *)

CROSSREFS

Cf. A018282, A003592, A069105, A070021, A070023.

Sequence in context: A033008 A082275 A059544 * A004940 A065816 A178029

Adjacent sequences:  A070019 A070020 A070021 * A070023 A070024 A070025

KEYWORD

base,nonn

AUTHOR

Henry Bottomley, Apr 12 2002

STATUS

approved

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Last modified July 22 10:03 EDT 2019. Contains 325219 sequences. (Running on oeis4.)