Pascal row sums and alternating sums (Full row sums to 2^n; alternating cancels; evens = half for n≥1)
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Full row sums to 2^n; alternating cancels; evens = half for n≥1
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Row index |
| r | Column |
When to use this
Standard binomial coefficients; n≥1 for alternating zero.