OFFSET
1,1
COMMENTS
FORMULA
a(n) = pi(A123677(n)).
a(n) = pi(pi(A277290(n))). - Bobby Jacobs, Oct 30 2016
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Oct 05 2006
EXTENSIONS
5313 found by Henri Lifchitz, from Jens Kruse Andersen, Jul 24 2014
STATUS
approved