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 A162694 Strictly positive numbers n such that 36*n/(36+n) are integers. 12
 12, 18, 36, 45, 72, 108, 126, 180, 288, 396, 612, 1260 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The 36th row of A127730. The ansatz 36*n/(36+n) = j (any integer j) yields n = 36*j/(36-j) which demonstrates that the sequence is finite if n >= 0. - R. J. Mathar, Jul 13 2009 Positive integers n such that half of the harmonic mean of 36 and n is an integer. - Wesley Ivan Hurt, Sep 07 2014 LINKS MATHEMATICA Select[Range[1000], IntegerQ[36#/(36 + #)] &] (* Alonso del Arte, Sep 06 2014 *) CROSSREFS Cf. A162688, A162689, A162690, A162691, A162692, A162693 Cf. A127730. [From Franklin T. Adams-Watters, Aug 07 2009] Sequence in context: A319746 A079479 A293692 * A230354 A197464 A124205 Adjacent sequences:  A162691 A162692 A162693 * A162695 A162696 A162697 KEYWORD nonn,fini,full AUTHOR Vladimir Joseph Stephan Orlovsky, Jul 10 2009 EXTENSIONS Edited by R. J. Mathar, Jul 13 2009 STATUS approved

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)