OFFSET
1,1
COMMENTS
a(7) (if it exists) = A242490(k) - 1, k >= 5 * 10^7. - Hiroaki Yamanouchi, Sep 22 2014
EXAMPLE
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Vladimir Shevelev and Peter J. C. Moses, May 22 2014
EXTENSIONS
a(6) from Hiroaki Yamanouchi, Sep 22 2014
STATUS
approved