This is why these kinds of sequence questions usually ask you for the BEST choice of a set of number because it's not about justifying the existence of the first two cases, but trying to show you have a logical brain in your head to find the pattern.
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sorry, that was 14 blocks in total at that point...and row four would have two "blocks" to figure the value of row 5...
again...these are not real blocks...this is not a real pyramid...it is simply a visual reference on how to run her formula.
Srsly, you shoulda stopped two posts ago. I'm not misunderstanding what you are trying to say, nor was I ever.
I'm just saying either your friend is dumb..or she thinks you are.