There has to be an easier way to do this and I thought I could update formulas dynamically by dragging into new cells but it's not working and I have no idea why.

Problem:
I have a time series of input from a device that samples at 40Hz. The output I get from this device in Excel consists of 40 columns in row 1 (representing the first second) and then it creates a new row - row 2 - which also consists of 40 columns of values (representing second 2) - and it does this until the end of the response period which for me is 10 seconds. When I do a quick filter I end up with 10 rows, each consisting of 40 columns of data and all of this represents 1 trial. This then repeats for 32 trials.

I want to have all of my data for each trial in the same row. So I want the first 10 rows essentially collapsed into 1 row so instead of a 10x40 matrix representing one trial I have a 1x400 matrix representing that trial.

It starts out well enough - I make a row for my first trial and, if trial 1 second 1 = H2:AV2 and I'm typing in cell AY2, I just write =H2 in cell AY2 and drag across for 40 cells until I get to CK2 which will have =AV2 in it because of the automatic updating from dragging. Then I move one cell over - to CL2 - and type in =H3 and start the whole process again until I have all my 400 values in one row. I know this is a tedious way to do this but I figured once I did this it would be a simple matter of formulas and dragging to fill in the rest.

Not so. Is there a way to dynamically update references? So for example, cell AY2 has the formula =H2 in it. Now I KNOW that in AY3 I want to have the formula =H12 (because the beginning of the next trial is 10 rows down from H2) and I know I want AY4 to have =H22 etc. but when I drag the reference to H2 down it just changes it to H3, which makes sense but having a formula like =AY2+10 returns the value in AY2+10 instead of the reference, which again makes sense but I'm totally blanking on how else to do this. I've tried using offset and indirect and offset, for example, will work if I hard code in the numbers (e.g. =offset(H2, 10, 0)) but if I drag this formula down neither the 10 nor the 0 changes so I get the same formula in every which is obviously not what I want (and I guess if it did change, it would just change the 10 to 11 anyway, which again, is not the increment I'm looking for). I've also played around with adding constants of 10 and got nowhere, probably because I'm doing it wrong because I'm fairly sure I'll have to add a constant of 10 somewhere.

I feel like the answer is staring me in the face and I just can't see it. Can anyone help?

Thanks.

Lauren