|
Search: id:A069947
|
|
|
| A069947 |
|
Denominator of Sum_{k=1..n} k/phi(k). |
|
+0
2
|
|
| 1, 1, 2, 2, 4, 4, 12, 12, 12, 12, 60, 60, 10, 30, 120, 120, 240, 240, 720, 720, 720, 720, 7920, 7920, 7920, 7920, 7920, 7920, 55440, 55440, 11088, 11088, 55440, 55440, 55440, 55440, 18480, 55440, 55440, 55440, 55440, 55440, 55440, 11088, 11088, 11088, 255024, 255024
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
REFERENCES
|
D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, Section I.27.
|
|
EXAMPLE
|
1, 3, 9/2, 13/2, 31/4, 43/4, 143/12, 167/12, 185/12, ...
|
|
CROSSREFS
|
Cf. A068885, A028415, A048049.
Sequence in context: A125553 A138317 A103659 this_sequence A051547 A095329 A106051
Adjacent sequences: A069944 A069945 A069946 this_sequence A069948 A069949 A069950
|
|
KEYWORD
|
nonn,frac
|
|
AUTHOR
|
njas, Jun 28 2002
|
|
|
Search completed in 0.002 seconds
|
