OFFSET
1,1
MATHEMATICA
ip={ the list of irregular primes to 12 million }; Table[ ip[[3^n]], {n, 0, 11}]
CROSSREFS
KEYWORD
hard,nonn
AUTHOR
Robert G. Wilson v, Apr 07 2005
EXTENSIONS
a(12) corrected and a(13)-a(17) added by Amiram Eldar, Mar 05 2019
STATUS
approved