How to skip a cell reference while dragging down a Hlookup formula

Hi,

I have a formula below that I want to drag and also skip every other cell reference.

A2:=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(90:$1083),FALSE)),HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(90:$1083),FALSE),0))/1000

So this formula basically looks up a value in row 90 from another her tab and tells me the value.

Now I want to drag this formula so that A3 and A4 and onwards look like this:
A3:=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(92:$1083),FALSE)),HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(92:$1083),FALSE),0))/1000

A4:=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(94:$1083),FALSE)),HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(94:$1083),FALSE),0))/1000

A5:=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(96:$1083),FALSE)),HLOOKUP(Sheet1!$C$10,'Sheet2'!$D$2:$O$1660,ROW(96:$1083),FALSE),0))/1000

Please help!

Thanks,

I used a helper column.

I set B3 = 92, B4 = 94

I set A3:="=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,Sheet2!$D$2:$O$1660,ROW("&B3&":$1083),FALSE)),HLOOKUP(Sheet1!$C$10,Sheet2!$D$2:$O$1660,ROW("&B3&":$1083),FALSE),0))/1000"

and B3:="=(IF(ISNUMBER(HLOOKUP(Sheet1!$C$10,Sheet2!$D$2:$O$1660,ROW("&B4&":$1083),FALSE)),HLOOKUP(Sheet1!$C$10,Sheet2!$D$2:$O$1660,ROW("&B4&":$1083),FALSE),0))/1000"

Then I selected both and dragged down, letting B count by 2's and the formula incrementing as necessary. After you fill in A3:A? you just select the formulas, copy, paste values, and activate them.

Sorry, but I have no idea what you just said. I am a beginner and I dont even know what a helper column is.

Can you explain it in baby steps?

Thank you!