OFFSET
1,2
COMMENTS
For all m, 2^A128123(m)-1 belongs to this sequence.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
OEIS Wiki, 2^n mod n
MATHEMATICA
Select[Range[2000], PowerMod[2, 9, #]==PowerMod[2, #, #]&] (* Harvey P. Dale, Apr 01 2017 *)
PROG
(PARI) isok(n) = Mod(2, n)^n == 2^9; \\ Michel Marcus, Sep 23 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited by Max Alekseyev, Jul 30 2011
Definition clarified by Harvey P. Dale, Apr 01 2017
STATUS
approved