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A283872 Numbers k such that gcd(phi(k), k-1) > lambda(k)^2. 1
432046225, 631071001, 4579461601, 8494657921, 53282340865, 80601412609 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
2320690177 is the only 2 < k < 10^11 such that gcd(phi(k),k-1) = lambda(k)^2. - Giovanni Resta, Mar 24 2017
LINKS
CROSSREFS
Sequence in context: A234396 A017408 A017528 * A233477 A117631 A022229
KEYWORD
nonn,more
AUTHOR
Thomas Ordowski and Altug Alkan, Mar 24 2017
EXTENSIONS
a(3)-a(6) from Giovanni Resta, Mar 24 2017
STATUS
approved

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Last modified July 12 07:52 EDT 2024. Contains 374239 sequences. (Running on oeis4.)