A few new facts about the EKG sequence.
Hofman, Piotr, Pilipczuk, Marcin (2008)
Journal of Integer Sequences [electronic only]
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Hofman, Piotr, Pilipczuk, Marcin (2008)
Journal of Integer Sequences [electronic only]
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Annals of Mathematics. Second Series
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Florian Luca (2008)
Czechoslovak Mathematical Journal
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For a positive integer we write for the Euler function of . In this note, we show that if is a fixed positive integer, then the equation has only finitely many positive integer solutions .
Levieil, Eric, Luca, Florian, Shparlinski, Igor E. (2005)
International Journal of Mathematics and Mathematical Sciences
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Integers
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De Koninck, Jean-Marie, Luca, Florian (2008)
Journal of Integer Sequences [electronic only]
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Goldston, D. A., Yıldırım, C. Y. (2003)
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