The sum of the squares of the first n positive integers is given by this formula:
The first 10 terms of this sequence are 1, 5, 14, 30, 55, 91, 140, 204, 285, 385.
What is the smallest number greater than 1 that is part of this sequence and that is also a perfect square?
Solution to the Problem:
The smallest number is 4,900 (when n = 24), which is 70 squared.Correctly solved by:
| 1. Vikash Kumar | New Delhi, India |
| 2. James Alarie | Flint, Michigan |
| 3. William Vargo | Calgary, Alberta, Canada |