OFFSET
1,85
COMMENTS
A semiprime triple is <= n if its least member is <= n;
if a(n-1)<a(n) then (n,n+1,n+2) is a semiprime triple, A086005(a(n))=n+1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 07 2003
STATUS
approved