

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
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OFFSET

1,1


COMMENTS

The 36th row of A127730.
The ansatz 36*n/(36+n) = j (any integer j) yields n = 36*j/(36j) 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

Table of n, a(n) for n=1..12.


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. AdamsWatters, 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



