Square Numbers which are Sum of Consecutive Powers/Mistake

Source Work

 * The Dictionary
 * $121$
 * $121$


 * The Dictionary
 * $121$
 * $121$

Mistake

 * $121$ is the only square number that is the sum of consecutive powers from $1$: $121 = 1 + 3 + 9 + 27 + 81$.

Correction

 * $400$ also has this property: $400 = 1 + 7 + 49 + 343$.