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!)
 A162691 Strictly positive numbers n such that 24*n/(24+n) are integers. 15
 8, 12, 24, 40, 48, 72, 120, 168, 264, 552 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The 24th row of A127730. The ansatz 24*n/(24+n)=j (any integer j) yields n=24*j/(24-j) which demonstrates that the sequence is finite if n>=0. [R. J. Mathar, Jul 13 2009] LINKS MATHEMATICA f[a_, b_]:=(a*b)/(a+b); a=24; lst={}; Do[If[f[a, n]==IntegerPart[f[a, n]], AppendTo[lst, n]], {n, 9!}]; lst CROSSREFS Cf. A162688, A162689, A162690 Cf. A127730. [From Franklin T. Adams-Watters, Aug 07 2009] Sequence in context: A278902 A088525 A054735 * A328538 A077566 A241482 Adjacent sequences:  A162688 A162689 A162690 * A162692 A162693 A162694 KEYWORD nonn,fini,full AUTHOR Vladimir Joseph Stephan Orlovsky, Jul 10 2009 EXTENSIONS Edited by R. J. Mathar, Jul 13 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 9 22:27 EST 2019. Contains 329880 sequences. (Running on oeis4.)