OFFSET
1,1
COMMENTS
FORMULA
a(n) = A203966(n+1) + 2. - Max Alekseyev, Feb 01 2024
EXAMPLE
4 is in the sequence because phi(4-2) = 1 divides 4-1 = 3.
PROG
(Magma) [n: n in [3..10000000] | (n-1) mod EulerPhi(n-2) eq 0]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jaroslav Krizek, Feb 25 2015
EXTENSIONS
a(9) confirmed by Max Alekseyev, Feb 01 2024
STATUS
approved