Highly Cototient Number
المؤلف:
Sloane, N. J. A.
المصدر:
Sequences A100827 and A105440 in "The On-Line Encyclopedia of Integer Sequences."
الجزء والصفحة:
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22-7-2020
1399
Highly Cototient Number
An integer 
is said to be highly cototient if the equation
has more solutions than the equations 
for all 
, where 
is the totient function.
The first few highly cototient numbers are 2, 4, 8, 23, 35, 47, 59, 63, 83, 89, ... (OEIS A100827).
The first few prime highly cototient numbers are 2, 23, 47, 59, 83, 89, 113, 167, 269, 389, 419, 509, ... (OEIS A105440).
REFERENCES:
Sloane, N. J. A. Sequences A100827 and A105440 in "The On-Line Encyclopedia of Integer Sequences."
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