OFFSET
1,2
COMMENTS
Are there entries in this sequence which are also in A153513 ?
Yes. This subsequence starts 721801, 873181, 4504501, 8646121, 9006401, 9863461, 10403641, 10680265,... (similar to A153580). - R. J. Mathar, Mar 30 2011
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[10^4], !PrimeQ[#] && PowerMod[5, #, # ] == Mod[5, #] && Mod[#, CarmichaelLambda[#]] != 1 &] (* Amiram Eldar, Sep 19 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 28 2008
STATUS
approved