OFFSET
1,3
COMMENTS
In other words, this is conjecturally the range of A006509. - M. F. Hasler, Mar 06 2024
Complement is A111339.
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Klaus Brockhaus, Nov 02 2005
EXTENSIONS
Name edited by M. F. Hasler, Mar 06 2024
Edited by N. J. A. Sloane, Mar 06 2024
STATUS
approved