OFFSET
1,2
COMMENTS
If it exists, a(7) > 732374267624.
EXAMPLE
1 * 3 * 7 * 9 * 13 * 15 = 36855, which is a lucky number.
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Naohiro Nomoto, Oct 09 2000
EXTENSIONS
One more term from Sascha Kurz, Oct 12 2001
STATUS
approved