Demonstration of the Happy Number graphs.

Inspired by Numberphile: 145 and the Melancoil - Numberphile

Maximum: Base:
Warning: Large maximum may take a significant amount of time to calculate.

Happy numbers are defined as follows

  1. Pick a number
  2. Sum the squared digits that make up the number
  3. Repeat until you loop or reach 1
  4. If you reach 1 the original number is defined as a happy number
Example:
Pick: 7
72 = 49
42 + 92 = 97
92 + 72 = 130
12 + 32 + 02 = 10
12 + 02 = 1
Therefore, 7 is a happy number

D3 used for graph visualization. Fork me on GitHub