and so on (ignore the - and _ I've included them to make formatting better).

If I asked what column is 18 in, you would say column 2.
The problem is as follows.

Derive a formula which will provide the column any specific number lies in given that the above pattern continues to infinity. i.e. the number x lies in column y.

and so on (ignore the - and _ I've included them to make formatting better).

If I asked what column is 18 in, you would say column 2.
The problem is as ...[text shortened]... that the above pattern continues to infinity. i.e. the number x lies in column y.