# Cube Number as Sum of Three Consecutive Odd Squares

## Theorem

$1331 = 11^3 = 19^2 + 21^2 + 23^2$

## Proof

 $\ds 19^2 + 21^2 + 23^2$ $=$ $\ds 361 + 441 + 529$ $\ds$ $=$ $\ds 1331$

$\blacksquare$

## Historical Note

In his Curious and Interesting Numbers, 2nd ed. of $1997$, David Wells attributes this result to Michal Stajsczak, but gives no context.