|
Search: id:A162825
|
|
|
| A162825 |
|
Positive numbers n such that 60*n/(60-n) are integers. |
|
+0
4
|
|
| 10, 12, 15, 20, 24, 30, 35, 36, 40, 42, 44, 45, 48, 50, 51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 72, 75, 76, 78, 80, 84, 85, 90, 96, 100, 105, 108, 110, 120, 132, 135, 140, 150, 160, 180, 204, 210, 240, 260, 285, 300, 360, 420, 460, 510
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
The number n=60 is explicitly included. The last entry in the sequence is 3660.
|
|
MATHEMATICA
|
f[a_, b_]:=(a*b)/(a-b); a=60; lst={}; Do[If[f[a, n]==IntegerPart[f[a, n]], AppendTo[lst, n]], {n, 9!}]; lst
|
|
CROSSREFS
|
Cf. A162688, A162689, A162690, A162691, A162692, A162693, A162694, A162817, A162818, A162819, A162820, A162821, A162822, A162823, A162824
Sequence in context: A054518 A072198 A057485 this_sequence A107836 A096128 A063192
Adjacent sequences: A162822 A162823 A162824 this_sequence A162826 A162827 A162828
|
|
KEYWORD
|
nonn,fini
|
|
AUTHOR
|
Vladimir Orlovsky (4vladimir(AT)gmail.com), Jul 13 2009
|
|
EXTENSIONS
|
Keyword fini added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 31 2009
|
|
|
Search completed in 0.002 seconds
|
