OFFSET
1,1
LINKS
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Mar 03 2007
EXTENSIONS
a(13)-a(14) from Max Alekseyev, Feb 23 2012
a(15)-a(19) using Kim Walisch's primecount, from Amiram Eldar, Mar 24 2019
STATUS
approved