Autopopulate a column

[medico]

I have a column with certain values and corresponding values in the next column. I want to be able to autopopulate a 4th column with the 3rd column equispaced, as shown in this figure. I only put 17 rows to get the message across, but I would eventually have until 36 in column "cr3." could you please help? Thanks

[TABLE="width: 500"]
<tbody>[TR]
[TD]cr1[/TD]
[TD]cr2[/TD]
[TD]cr3[/TD]
[TD]populate[/TD]
[/TR]
[TR]
[TD]0[/TD]
[TD]1[/TD]
[TD]0[/TD]
[TD]?[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]17[/TD]
[TD]1[/TD]
[TD]?[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]17[/TD]
[TD]2[/TD]
[TD]?[/TD]
[/TR]
[TR]
[TD]3[/TD]
[TD]4[/TD]
[TD]3[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]9[/TD]
[TD]4[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]5[/TD]
[TD]8[/TD]
[TD]5[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]6[/TD]
[TD]7[/TD]
[TD]6[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]7[/TD]
[TD]2[/TD]
[TD]7[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]8[/TD]
[TD]1[/TD]
[TD]8[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]10[/TD]
[TD]3[/TD]
[TD]9[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]11[/TD]
[TD]1[/TD]
[TD]10[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]13[/TD]
[TD]1[/TD]
[TD]11[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]14[/TD]
[TD]1[/TD]
[TD]12[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]16[/TD]
[TD]1[/TD]
[TD]13[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]18[/TD]
[TD]1[/TD]
[TD]14[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]36[/TD]
[TD]1[/TD]
[TD]15[/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

 

[Russell_Leaves]

Not really understanding your question.

Your figure is a bit unclear.

Also not familiar with the term "equispaced".

Do you want the 4th col to = ?, if so key "?".

If the 4th col is to equal the 3rd col, use for example "=C2" in D2 and drag the formula down the number of required cells.

Maybe this will give you a start or will allow you to re-word your question so that I or others may be able to assist.