|
Search: id:A152215
|
|
|
| A152215 |
|
Numbers n such that sigma_2(n)/(sigma_1(n)*sigma_0(n)) = c, c an integer. |
|
+0
1
|
|
| 1, 4, 25, 100, 121, 256, 289, 484, 529, 841, 1156, 1600, 1681, 2116, 2209, 2809, 3025, 3364, 3481, 5041, 6400, 6724, 6889, 7225, 7921, 8836
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
n : A001157(n)/(A000203(n)*A000005(n)) = c, c an integer.
|
|
CROSSREFS
|
Cf. A000005, A000203, A001157, A003601, A094471, A140480, A003601, A020486, A020487
Sequence in context: A027764 A095669 A027949 this_sequence A082044 A042651 A070764
Adjacent sequences: A152212 A152213 A152214 this_sequence A152216 A152217 A152218
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Ctibor O. Zizka (c.zizka(AT)email.cz), Nov 29 2008
|
|
|
Search completed in 0.002 seconds
|
