The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A146754 Numbers m with the property that shifting the rightmost digit of m to the left end multiplies the number by 5. 7
 142857, 142857142857, 142857142857142857, 142857142857142857142857, 142857142857142857142857142857, 142857142857142857142857142857142857, 102040816326530612244897959183673469387755, 122448979591836734693877551020408163265306, 142857142857142857142857142857142857142857 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS From Seiichi Manyama, Aug 22 2017: (Start) For k >= 1, (10^(6*k) - 1)/7 is a term. For 5 <= a <= 9 and k >= 1, a*(10^(42*k) - 1)/49 is a term. (End) LINKS Table of n, a(n) for n=1..9. Wikipedia, Parasitic number. EXAMPLE From Seiichi Manyama, Aug 22 2017: (Start) b1 = 14285. a(1) = b1*10 + 7, 5*a(1) = 714285 = 7*10^5 + b1. b7 = 10204081632653061224489795918367346938775. a(7) = b7*10 + 5, 5*a(7) = 510204081632653061224489795918367346938775 = 5*10^41 + b7. (End) CROSSREFS Cf. A146088 (k=2), A146561 (k=3), A146569 (k=4), this sequence (k=5), A291215 (k=7). Cf. A092697, A097717. Sequence in context: A306265 A144504 A344436 * A180340 A004042 A145742 Adjacent sequences: A146751 A146752 A146753 * A146755 A146756 A146757 KEYWORD nonn,base AUTHOR N. J. A. Sloane, based on correspondence from William A. Hoffman III (whoff(AT)robill.com), Apr 10 2009 STATUS approved

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

Last modified December 3 18:21 EST 2023. Contains 367540 sequences. (Running on oeis4.)