Selectively "GetItemAtIndex"

Hi everyone,

I’m looking to find a way to be able to selectively get certain items from a list by their index. It’s more like Fibonacci where the space between two index increase incrementally. For now I can manually count and hand-picked them by entering their index. I hope there is a way to do this automatically.

Here is the a logic (if it makes sense.)
N=spacing between two index, if starts with N1=1, then N2=2, N3=3…etc.

@sliang-clda You’re effectively looking to obtain the cumulative sum

sumSeq.dyn (15.5 KB)

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Thank you @Vikram_Subbaiah. This is exactly what I’m look for!

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