S(6, 3) = \frac16 \left( 3^6 - 3 \cdot 2^6 + 3 \cdot 1^6 \right) = \frac16 (729 - 192 + 3) = \frac5406 = 90. - AMAZONAWS

📅 March 6, 2026 👤 scraface

Mar 06, 2026

$S(6, 3) = \frac{1}{6} \left( 3^6 - 3 \cdot 2^6 + 3 \cdot 1^6 \right) = \frac{1}{6} (729 - 192 + 3) = \frac{540}{6} = 90.$