OFFSET
1,1
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
MATHEMATICA
fQ[p_, n_] := MultiplicativeOrder[p, n] == n - 1; Select[Prime[Range[400]], fQ[2, #] && fQ[3, #] &]
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Apr 16 2014
STATUS
approved