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A283872 Numbers n such that gcd(phi(n), n-1) > lambda(n)^2. 0
432046225, 631071001, 4579461601, 8494657921, 53282340865, 80601412609 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

2320690177 is the only 2 < n < 10^11 such that gcd(phi(n),n-1) = lambda(n)^2. - Giovanni Resta, Mar 24 2017

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A000010, A002322, A049559, A264012, A283656.

Sequence in context: A234396 A017408 A017528 * A233477 A117631 A022229

Adjacent sequences:  A283869 A283870 A283871 * A283873 A283874 A283875

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 October 20 12:34 EDT 2018. Contains 316379 sequences. (Running on oeis4.)