OFFSET
1,6
COMMENTS
Subset of A243995.
a(p)=0 if p is prime.
LINKS
Paolo P. Lava, Table of n, a(n) for n = 1..1000
EXAMPLE
sigma(72) = 195, phi(72) = 24, d(72) = 12 and phi(195 - 24 - 12) = 104.
MAPLE
with(numtheory): P:=proc(q) local n;
for n from 1 to q do print(phi(sigma(n)-phi(n)-tau(n)));
od; end: P(100);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paolo P. Lava, Jun 19 2014
STATUS
approved