OFFSET
1,2
COMMENTS
Contains 2 * A203966 as a subsequence. - Max Alekseyev, Oct 27 2023
MATHEMATICA
Select[Range[50000000], Divisible[#+2, EulerPhi[#]]&]
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
José María Grau Ribas, Feb 19 2012
EXTENSIONS
a(12)-a(13) from Donovan Johnson, Mar 01 2012
a(14) from Max Alekseyev, Oct 27 2023
STATUS
approved