A070022 1/n has period 2 in base 10.

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

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 A367339 A065816

Adjacent sequences: A070019 A070020 A070021 * A070023 A070024 A070025

Keyword

base,nonn

Author

Henry Bottomley, Apr 12 2002

Status

approved