OFFSET
1,21
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..100000
MATHEMATICA
a[n_] := GCD[n - 1, EulerPhi[n]] / GCD[n - 1, CarmichaelLambda[n]]; Array[a, 100] (* Amiram Eldar, May 13 2022 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 13 2022
STATUS
approved