This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A181431 For n not divisible by 10 and using as many leading zeros as needed, smallest number whose inverse has only digits of n in its period. 1
 9, 45, 3, 225, 18, 15, 142857, 1125, 11, 909, 825, 76923, 714285, 66, 61875, 588235294117647, 55, 52631578947368421, 47619, 4545, 434782608695652173913, 4125, 396, 384615, 37, 3571425, 344827586206896551724137931, 32258064516129 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(13)=76923 because 1/76923=.000013 000013 000013... and is the smallest number whose inverse contains only 13 in its period. CROSSREFS Sequence in context: A037207 A225488 A096688 * A249067 A124983 A087969 Adjacent sequences:  A181428 A181429 A181430 * A181432 A181433 A181434 KEYWORD nonn,base AUTHOR Jeff Burch, Oct 19 2010 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 10 00:54 EST 2019. Contains 329885 sequences. (Running on oeis4.)