OFFSET
1,7
COMMENTS
Lambda is the function in A002322.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10000
EXAMPLE
a(19) = 13 because lambda(19) = 18 and the sum of the 3 odd divisors {1, 3, 9} is 13.
MATHEMATICA
Table[Total[Select[Divisors[CarmichaelLambda[n]], OddQ[ # ]&]], {n, 67}]
PROG
(PARI) a(n) = sumdiv(lcm(znstar(n)[2]), d, d*(d%2));
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Lagneau, Jul 22 2011
EXTENSIONS
More terms from Antti Karttunen, Aug 22 2017
STATUS
approved