auto incremental columns in table of org-mode?

[poppyer]

Hi, guys,


I am using orgtbl-mode minor mode, basically as following:

| k |   n | f(n,k) |
|---+-----+--------|
| 1 | 100 |        |
| 2 |     |        |
| 3 |     |        |
|   |     |        |
|   |     |        |
|   |     |        |

My question is how can I fill the k column when I add rows?

cheers,
poppyer

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