Home / S_6 = 5 \frac{2^6 - 1}{2 - 1} = 5 \times (64 - 1) = 5 \times 63 = 315S_6 = 5 \frac{2^6 - 1}{2 - 1} = 5 \times (64 - 1) = 5 \times 63 = 315February 22, 2026