OFFSET
0,11
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000
MAPLE
a:= n-> (f-> f(f(n+1))-f(f(n)))(numtheory[phi]):
seq(a(n), n=0..100); # Alois P. Heinz, Jun 20 2022
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 12 2005
EXTENSIONS
Definition corrected by N. J. A. Sloane, Feb 14 2018
STATUS
approved