Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1.
Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers (or sad numbers)
For example, 13 is happy:
1² + 3² = 10
1² + 0² = 1
The happy numbers up to 100 are: 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100
We aren't sure how these are useful, but they are kind of cool.
* Sage-N Research is now offering online tutorials show the ease of use with our GEMYNI platform on SORCERER and to give you the tools that will open up a whole new world of what you can do with your SORCERER. See our blog here: "SORCERER Support How To's" that include these online videos