OFFSET
1,1
EXAMPLE
a(1)=2 (=phi(5)/2); a(2)=3 (=phi(7)/2); a(3)=2 (=phi(8)/2); a(4)=3 (=phi(9)/2); a(5)=2 (=phi(10)/2); a(6)=5 (=phi(11)/2).
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Oct 26 2009
EXTENSIONS
Extended by R. J. Mathar, Oct 28 2009
STATUS
approved