| Giver | Post | Date |
| chezho | Re: The sequence a1, a2, a3, ..., an, ... is such that i*a_i=j*aj for any | 08-Feb-2012 |
| vinnik | Re: The sequence a1, a2, a3, ..., an, ... is such that i*a_i=j*aj for any | 08-Feb-2012 |
| LalaB | Re: The sequence a1, a2, a3, ..., an, ... is such that i*a_i=j*aj for any | 07-Feb-2012 |