Definition:Happy Number/Sequence
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Sequence of Happy Numbers
The sequence of happy numbers begins:
- $1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, 103, 109, 129, 130, \ldots$
This sequence is A007770 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).