OFFSET
1,1
COMMENTS
Primes of the form 222...221.
The number of 2's in each term is given by the corresponding term of A056660 and so the first term too large to include above is 222...2221 (with 120 2's).
LINKS
CROSSREFS
KEYWORD
bref,nonn
AUTHOR
Rick L. Shepherd, Feb 22 2004
STATUS
approved