OFFSET
1,1
COMMENTS
This sequence is infinite because Jensen proved in 1915 that there are infinitely many irregular primes.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Nov 08 2007
EXTENSIONS
More terms from R. J. Mathar, Nov 12 2007
STATUS
approved