OFFSET
1,3
EXAMPLE
a(4) = 3: the largest prime of a set is 4th prime. the three sets are 7/1 = 7, (5+7)/2 = 6, (3+5+7)/3 = 5.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Naohiro Nomoto, May 08 2003
STATUS
approved