How Do You Find Out A Happy Or Sad Number Without Doing Too Much Work?
I want to find out how to know what numbers are happy without having to square all the Digits all the time.
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Comments on How Do You Find Out A Happy Or Sad Number Without Doing Too Much Work?
What is a happy number?
Another way to know which is which is to remember it, and it is the only one way without working it out.
Here are the first few happy numbers:
1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, 103, 109, 129, 130, 133, 139, 167, 176, 188, 190, 192, 203, 208, 219, 226, 230, 236, 239, 262, 263, 280, 291, 293, 301, 302, 310, 313, 319, 320, 326, 329, 331, 338, 356, 362, 367, 368, 376, 379, 383, 386, 391, 392, 397, 404, 409, 440, 446, 464, 469, 478, 487, 496.
HAPPY
ND
Use the following sites:http://en.wikipedia.org/wiki/Happy_numbe…http://www.research.att.com/~njas/sequen…
Wikipedia has the list of the second site with an extra 15 numbers.