Geodesic
Semihappy numbers
Journal of integer sequences, Tome 13 (2010) no. 4.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: We generalize the concept of happy number as follows. Let $ {\mathbf e}= (e_0,e_1,....)$ be a sequence with $ e_0 = 2$ and $ e_i = \{1,2\}$ for $ i > 0$. Define by
Classification : 11A63
Keywords: happy numbers, semihappy numbers 
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     author = {Grundman, H.G.},
     title = {Semihappy numbers},
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     number = {4},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2010__13_4_a5/}
}
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Grundman, H.G. Semihappy numbers. Journal of integer sequences, Tome 13 (2010) no. 4. http://geodesic.mathdoc.fr/item/JIS_2010__13_4_a5/