OFFSET
1,2
COMMENTS
LINKS
EXAMPLE
a^1(1)=a(1)=1.
a^2(2)=a(a(2))=a(4)=2.
a^3(3)=a(a(a(3)))=a(a(6))=a(9)=3.
PROG
(Perl) See Links section.
CROSSREFS
KEYWORD
nonn,nice
AUTHOR
Paul Tek, Mar 31 2015
STATUS
approved