OFFSET
1,6
LINKS
Vassilis Papadimitriou, Table of n, a(n) for n=1,...,10000.
FORMULA
EXAMPLE
For n=1 the a(1)= 1, as the first odd squarefree semiprime is 15, lambda(15)=4 and ord(2,15)=4
MATHEMATICA
(CarmichaelLambda[#]/MultiplicativeOrder[2, #]) & /@ Select[Range[1, 530, 2], PrimeOmega[#] == 2 && PrimeNu[#] == 2 &] (* Amiram Eldar, Feb 24 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Vassilis Papadimitriou, Mar 19 2010
STATUS
approved